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SEBASTIEN Underwear set + swimsuit - Boy 3-12Y - PDF Sewing Pattern

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Paper Sewing Pattern

Underwear set + Swimsuit - PDF Sewing Pattern & Guidebook

Underwear set + swimsuit pattern for boys 

Underwear : tank-top and shorty and a swimsuit boxershorty
Underwear : Ribbing at armholes and neckline, fancy elastic at waistband, gusset at shorty front with full lining and enclosed seams, and dart at gusset. No seam at back, side seams.

Swimsuit : seams at crotches, no side seams, elastic into waistband, full lining 
 

Sewing level :   easy to intermediate

What you will learn with this sewing pattern:

how to sew ribbing, how to assemble a gusset with lining and enclosed seams, how to sew elastics, how to assemble a full lining at swimsuit.

Age range :   3, 4, 5, 6, 7, 8, 9 10, 11, 12 years

See the size guide

PDF pattern :

  • 12 pages tutorial (bilingual French / English)
  • PDF pattern A4 or US letter format: 12 pages for 3 and 4 years, 15 pages from 5 to 12 years (1 file per size + 1 multi-size file)
  • PDF pattern A0 format: 1 page
  • PDF pattern file for projection

Specificities regarding underwear and swimwear

Underwear and swimwear must be very close to the body (for swimsuit, panties or boxers in particular because they are small parts for which the height is less important than the build and the age of the child ....) it is recommended not to take an age above the real age of the child. For example, as long as a child has not reached 7 years, make small pieces of swimwear and underwear in 6 years. If in doubt, it is better to take the size below than the size above.

Material suggestions: 

Underwear : jersey with or without elastan, ribbing.  
Swimsuit : jersey in polyamide or polyester with lycra (around 20% of lycra). For the lining : use main fabric or special polyester moss crepe

Trims : 

  • basic or fancy elastic 3 to 4 cm wide for underwear short
  • elastic 2 cm wide for the swimwear shorty
  • fully voluminous polyester thread (multi-fibers) and polyester basic thread
  • special needle for jersey and evene microtex needle for swimsuit is better
  • double needle for hems (if you do not have one, it is possible to replace all the points made with a double needle by a zig-zag stitch) - prefer the special needle for jersey 
  • Wonder clips (better than pins for the swimsuit fabric)
  • double training foot for sewing machine

Video Tutorial in free access here

  Fabrics and elastics are available on the French website ikatee.fr (we ship overseas)

See our jerseys , swimsuit lycra fabrics and trims collection on ikatee.fr

Ikatee Sewing patterns are copyrighted and using them outside of home use is forbidden.

Tag you own creations or discover other creations with #ikateesebastien.

In stock

Supplies and trims :


Age 3 4 5 6 7 8 9 10 11 12
Height in cm 98 104 110 116 122 128 134 140 146 152
Fabric 1 in 140cm  Underwear - top 40 45 45 50 50 50 55 55 60 60
Fabric 1 or 2  in 140cm 		 Underwear - boxershorts 25 25 25 25 25 25 25 30 30 30
Ribbing (70cm wide)
Underwear - top		 15 15 15 15 15 15 15 15 15 15
Elastic Underwear 3-4cm wide 50 52 54 55,5 57 58,5 60 61,5 63 64,5
Fabric 3 - 140cm wide Swimsuit outer fabric 20 20 20 25 25 25 25 25 30 30
If belt in other colour 10 10 10 10 10 10 10 10 10 10
Fabric 3 or 4 - 140cm wide swimsuit lining 20 20 20 25 25 25 25 25 30 30
Elastic 2 to 2,5cm wide 50 52 54 55,5 57 58,5 60 61,5 63 64,5
 

What you will receive with this sewing pattern :

    • A PDF file for each size to print at home (sizes 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 years) in A4 or us letter size - 12 or 15 pages according to sizes
    • A PDF file for all sizes together to print at home (3 to 12 years) in A4 or us letter size - 15 pages
    • A PDF file for all sizes together to print at home (3 to 12 years) in A0 size - 1 page only
    • A PDF file for projection
    • A PDF file for the guidebook with all detailed steps (in english and in french - 2 different files of 12 pages each)
    You receive an email with the download links right after payment. Download, print and start creating your own garments! For more info on how to use the digital sewing patterns created by Ikatee, please check our instructions.
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href=\"https:\/\/ikatee.com\/pages\/sebastien-sewing-pattern-video-tutorial\" style=\"color: #bf9000;\"\u003eVideo Tutorial in free access here\u003c\/a\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/ikatee.com\/pages\/sebastien-sewing-pattern-video-tutorial\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1276\/3053\/files\/1_54cfc2a3-9950-49cf-a416-ce1055960e16_large.png?v=1556530373\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan style=\"color: #bf9000;\"\u003e Fabrics and elastics are available on the French website ikatee.fr (we ship overseas)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSee our \u003ca href=\"https:\/\/ikatee.fr\/collections\/jerseys\"\u003ejerseys\u003c\/a\u003e , \u003ca href=\"https:\/\/ikatee.fr\/collections\/maillot-de-bain\"\u003eswimsuit lycra fabric\u003c\/a\u003es and \u003ca href=\"https:\/\/ikatee.fr\/collections\/elastiques-lingerie\"\u003etrims 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children","id":46149084971353,"position":16,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1168_e2b9bce4-0dde-42e3-9b98-84125e818706.jpg?v=1747401884"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1168_e2b9bce4-0dde-42e3-9b98-84125e818706.jpg?v=1747401884","width":1200},{"alt":"Sewing underwear and swimwear for children","id":46149085004121,"position":17,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1176_ab62bbc4-7fa5-44e1-833e-29e0daa2b3d8.jpg?v=1747401884"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1176_ab62bbc4-7fa5-44e1-833e-29e0daa2b3d8.jpg?v=1747401884","width":1200},{"alt":"Sewing underwear and swimwear for boys","id":46149085069657,"position":18,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1160_ab426fb0-1f5d-474a-9796-3e1876af78d6.jpg?v=1747401884"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1160_ab426fb0-1f5d-474a-9796-3e1876af78d6.jpg?v=1747401884","width":1200},{"alt":"DIY underwear","id":46149085102425,"position":19,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/ikatee.com\/cdn\/shop\/files\/ACF69B6D-C027-4544-863D-80F8868BF2B3.jpg?v=1747401884"},"aspect_ratio":1.0,"height":1000,"media_type":"image","src":"\/\/ikatee.com\/cdn\/shop\/files\/ACF69B6D-C027-4544-863D-80F8868BF2B3.jpg?v=1747401884","width":1000},{"alt":"Underwear pattern PDF format","id":46149085135193,"position":20,"preview_image":{"aspect_ratio":1.0,"height":2370,"width":2370,"src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1155_d3d0f2c9-f4f2-4c18-8e6d-ea00ea4b6815.jpg?v=1747401884"},"aspect_ratio":1.0,"height":2370,"media_type":"image","src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1155_d3d0f2c9-f4f2-4c18-8e6d-ea00ea4b6815.jpg?v=1747401884","width":2370},{"alt":"Swimsuit sewing pattern PDF format","id":46149085200729,"position":21,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1158_5d346da4-b208-48c0-9170-c33cf6a8699a.jpg?v=1747401884"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/ikatee.com\/cdn\/shop\/files\/IMG_1158_5d346da4-b208-48c0-9170-c33cf6a8699a.jpg?v=1747401884","width":1200},{"alt":"Paper underwear and swimsuit sewing pattern for children","id":46149085233497,"position":22,"preview_image":{"aspect_ratio":0.999,"height":1201,"width":1200,"src":"\/\/ikatee.com\/cdn\/shop\/files\/SEBASTIENbilingue17_242.jpg?v=1747401884"},"aspect_ratio":0.999,"height":1201,"media_type":"image","src":"\/\/ikatee.com\/cdn\/shop\/files\/SEBASTIENbilingue17_242.jpg?v=1747401884","width":1200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch2 class=\"layoutArea\" style=\"text-align: left;\"\u003e\n\u003cimg alt=\"\" style=\"float: none;\"\u003eUnderwear set + Swimsuit - PDF Sewing Pattern \u0026amp; Guidebook\u003c\/h2\u003e\n\u003cp\u003eUnderwear set + swimsuit pattern for boys \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eUnderwear\u003c\/span\u003e : tank-top and shorty and a swimsuit boxershorty\u003cbr\u003eUnderwear : Ribbing at armholes and neckline, fancy elastic at waistband, gusset at shorty front with full lining and enclosed seams, and dart at gusset. No seam at back, side seams.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eSwimsuit\u003c\/span\u003e : seams at crotches, no side seams, elastic into waistband, full lining \u003cbr\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSewing level :  \u003cspan style=\"color: #999999;\"\u003e easy to intermediate\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cb\u003eWhat you will learn with this sewing pattern:\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003e\u003c\/b\u003ehow to sew ribbing, how to assemble a gusset with lining and enclosed seams, how to sew elastics, how to assemble a full lining at swimsuit.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cstrong\u003eAge range\u003c\/strong\u003e :  \u003cspan style=\"color: #999999;\"\u003e 3, 4, 5, 6, 7, 8, 9 10, 11, 12 years\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"color: #999999;\"\u003e \u003cspan\u003eSee the size\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003ca href=\"https:\/\/ikatee.com\/pages\/size-guide\"\u003eguide\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003cstrong\u003ePDF pattern\u003c\/strong\u003e :\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e12 pages tutorial (bilingual French \/ English)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003ePDF pattern A4 or US letter format: 12 pages for 3 and 4 years, 15 pages from 5 to 12 years (1 file per size + 1 multi-size file)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003ePDF pattern A0 format: 1 page\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/ikatee.com\/pages\/projector-sewing-patterns-how-does-it-work\"\u003ePDF pattern file for projection\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eSpecificities regarding underwear and swimwear\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eUnderwear and swimwear must be very close to the body (for swimsuit, panties or boxers in particular because they are small parts for which the height\u003cspan\u003e \u003c\/span\u003eis less important than the build and the age of the child ....) it is recommended not to take an age above the real age of the child. For example, as long as a child has not reached 7 years, make small pieces of swimwear and underwear in 6 years. If in doubt, it is better to take the size below than the size above.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cstrong\u003eMaterial suggestions:\u003c\/strong\u003e \u003c\/h2\u003e\n\u003cp\u003eUnderwear : jersey with or without elastan, ribbing.  \u003cbr\u003eSwimsuit : jersey in polyamide or polyester with lycra (around 20% of lycra). For the lining : use main fabric or special polyester moss crepe\u003c\/p\u003e\n\u003ch2\u003eTrims : \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ebasic or fancy elastic 3 to 4 cm wide for underwear short\u003c\/li\u003e\n\u003cli\u003eelastic 2 cm wide for the swimwear shorty\u003c\/li\u003e\n\u003cli\u003efully voluminous polyester thread (multi-fibers) and polyester basic thread\u003c\/li\u003e\n\u003cli\u003especial needle for jersey and evene microtex needle for swimsuit is better\u003c\/li\u003e\n\u003cli\u003edouble needle for hems (if you do not have one, it is possible to replace all the points made with a double needle by a zig-zag stitch) - prefer the special needle for jersey \u003c\/li\u003e\n\u003cli\u003eWonder clips (better than pins for the swimsuit fabric)\u003c\/li\u003e\n\u003cli\u003edouble training foot for sewing machine\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan style=\"color: #bf9000;\"\u003e\u003ca href=\"https:\/\/ikatee.com\/pages\/sebastien-sewing-pattern-video-tutorial\" style=\"color: #bf9000;\"\u003eVideo Tutorial in free access here\u003c\/a\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/ikatee.com\/pages\/sebastien-sewing-pattern-video-tutorial\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1276\/3053\/files\/1_54cfc2a3-9950-49cf-a416-ce1055960e16_large.png?v=1556530373\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan style=\"color: #bf9000;\"\u003e Fabrics and elastics are available on the French website ikatee.fr (we ship overseas)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSee our \u003ca href=\"https:\/\/ikatee.fr\/collections\/jerseys\"\u003ejerseys\u003c\/a\u003e , \u003ca href=\"https:\/\/ikatee.fr\/collections\/maillot-de-bain\"\u003eswimsuit lycra fabric\u003c\/a\u003es and \u003ca href=\"https:\/\/ikatee.fr\/collections\/elastiques-lingerie\"\u003etrims \u003c\/a\u003ecollection on ikatee.fr\u003c\/p\u003e"}