Swimming costume patterns

Creating swimwear may seem difficult, but our sewing patterns make it accessible to everyone. Our patterns are designed to be easy to follow, enabling even beginners to make unique, quality swimwear.

Who are our bosses for?

Whether you're an experienced dressmaker or just starting out, our sewing patterns are ideal for you. Each pattern is precisely detailed, guiding you through every step, from cutting the fabric to final assembly. You'll find a variety of styles and sizes, allowing you to choose the one that best suits your tastes and needs. So if you're looking for a swimming costume pattern to make your own creations, Idonim is the shop for you! We also offer all the materials you need to make your own shirts.

For men and women who want unique swimwear, our patterns offer unparalleled creative freedom. The designs available cater for all body shapes and preferences, allowing you to explore your own style while enjoying the comfort of a handmade garment. The materials, accessories and fabrics recommended with our patterns are carefully selected to ensure a perfect fit and optimum durability. Using our sewing patternsWith Idonom, you can be sure of creating a swimming costume that not only fits you perfectly, but also reflects your personality, skill and passion. Whether it's for a day at the beach, a swim session or relaxing by the pool, sewing your own swimming costume with Idonom patterns is a rewarding way to update your wardrobe every summer.

Find your future swimwear pattern

6 Products

Vue d'ensemble

Bikini pattern - GIULIETTA

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13,00€ – 17,00€

The GIULIETTA swimming costume is a 2-piece specially designed for generous breasts. Comfortable and elegant, it adapts to your shape thanks to its curvy cut. Each cup has 2 darts. The GIULIETTA pattern is available in cup sizes D/E.

You can choose between 2 models for the top and 2 models for the bottom.

For the top :
- model A closes on the back with a clasp
- model B closes with 2 ties on the back

For the bottom:
- model A is a classic swimming costume bottom
- Model B has a buckle with a decorative bow.

The bikini is fully lined for a top-of-the-range result!
The top is lined with medium powernet for good support. The design incorporates this fabric.

Idonim's patterns are easy to understand and use. A step-by-step guide with photos will help you make your swimming costume.

You will also find some additional tips and tricks for choosing your supplies (type of needle, appropriate textiles, assembly techniques ...)

Pattern and instructions available in English and French; downloadable or in paper format.

The pattern is sold with its instruction booklet for sizes 36 to 50 (FR) / 04 to 18 (US) included

Select options This product has multiple variants. The options may be chosen on the product page
Vue d'ensemble

1-piece swimming costume pattern - JILLIAN

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13,00€ – 17,00€

The JILLIAN swimming costume is a 1-piece. Its princess-cut cups make it a timeless model.
The swimming costume is curvy. It's very comfortable and adapts perfectly to your body shape.
The JILLIAN pattern is available in 2 cup sizes B/C or D/E, from size 34 to 48 (FR).

2 models are available:
- model A: swimming costume with a decorative ring in the centre of the neckline.
- model B: swimming costume with traditional straps.

The front and back of the jersey are fully lined for a high-end finish. We will advise you of the assembly range if you do not wish to have the back lined. The range will be different.

This design is also available in a 2-piece version; this pattern is also on sale in the shop.

Idonim's patterns are easy to understand and use. A step-by-step guide with photos will help you make your swimming costume.

You will also find some additional tips and tricks for choosing your supplies (type of needle, appropriate textiles, assembly techniques ...)

Pattern and instructions available in English and French; downloadable or in paper format.

The pattern is sold with its instruction booklet for sizes 34 to 48 (FR) / 02 to 16 (US) included

Select options This product has multiple variants. The options may be chosen on the product page
Vue d'ensemble

1-piece swimming costume pattern - MAEVA

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13,00€ – 17,00€

The MAEVA swimming costume is a trendy asymmetric 1-piece.
The swimming costume has a curvy shape and breast darts to adapt perfectly to your body shape.
The MAEVA pattern is available in 2 cup sizes B/C and D/E, from size 36 to 48 (FR).

2 back closure options are available:
- model A with a clasp
- model B with 2 straps to tie on the back of the swimming costume

The front and back of the jersey are fully lined for a premium finish.

Idonim's patterns are easy to understand and use. A step-by-step guide with photos will help you make your swimming costume.

You will also find some additional tips and tricks for choosing your supplies (type of needle, appropriate textiles, assembly techniques ...)

Pattern and instructions available in English and French; downloadable or in paper format.

The pattern is sold with its instruction booklet for sizes 36 to 48 (FR) / 04 to 16 (US) included

Select options This product has multiple variants. The options may be chosen on the product page
Vue d'ensemble

MILA 1-piece swimming costume pattern

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13,00€ – 17,00€

The MILA swimming costume is a feminine one-piece swimming costume, available in several finishes. The swimming costume has a very comfortable and elegant "curvy" shape that will adapt to your morphology. Each size is available in 2 cup sizes B/C or D/E.

Each version is available with breast darts and is lined in the front. Different cut-outs are possible and add a sophisticated touch.

You can choose between :
- 3 front versions
- 2 back versions with different types of knotting

The models are presented as follows:

- model A : one-piece swimming costume, classic shape
- model B : swimming costume with horizontal yoke in the front underlining the waist
- model C : swimming costume with horizontal underbust yoke and full cups. This model is available with a cup lining that allows the insertion of foam. This is the most supportive model.

You can reverse the type of back to your liking. They are interchangeable on each model!

The Idonim patterns are easy to understand and use. A step-by-step guide with photos will accompany you during the making of the panties.

You will also find some additional tips and tricks for choosing your supplies (type of needle, appropriate textiles, assembly techniques ...)

Pattern and instructions available in English and French; downloadable or in paper format.

The pattern is sold with its instruction booklet for sizes 34 to 48 (FR) / 02 to 16 (US) included

Select options This product has multiple variants. The options may be chosen on the product page
Vue d'ensemble

2-piece swimming costume pattern - JOY

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13,00€ – 17,00€

The JOY swimming costume is a 2-piece swimming costume. Comfortable and elegant, it adapts to your shape thanks to its curvy cut. Its princess-cut cups make it a timeless model.
The JOY pattern is available in 2 cup sizes B/C or D/E, from size 34 to 48 (French sizes).

You can choose between 2 models for the top:
- model A: swimming costume with a decorative ring in the centre of the neckline.
- model B: swimming costume with traditional straps.

And 2 models for more or less low-cut bottoms.

For each version, the front is fully lined for a top-of-the-range result!

Because of the princess cut, you won't be able to slip foam into the cups, even though they're lined.

This model also comes in a 1-piece swimming costume version, which you'll also find on sale in the boutique.

Idonim's patterns are easy to understand and use. A step-by-step guide with photos will help you make your swimming costume.

You will also find some additional tips and tricks for choosing your supplies (type of needle, appropriate textiles, assembly techniques ...)

Pattern and instructions available in English and French; downloadable or in paper format.

The pattern is sold with its instruction booklet for sizes 34 to 48 (FR) / 02 to 16 (US) included

Select options This product has multiple variants. The options may be chosen on the product page
Vue d'ensemble

Men's shorts pattern - LEO

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13,00€ – 17,00€

The Léo pattern is designed for men. A practical and comfortable pair of swimming shorts. They're also easy to wear as a casual, fashionable piece of clothing.

You can choose between 2 versions:
- model A: Bermuda-style mid-length shorts.
- model B: short shorts.

Each version includes options:
- 1 - two side pockets
- 2 - a patch pocket on the back
- 3 - mesh inner briefs

The waistband is elasticated with a drawstring.

We designed the Léo shorts to be both functional and elegant.
The finishes are designed to be professional!

Made from a warp and weft fabric, the Léo shorts are easy to make, provided you have a few notions of sewing and know how to use a sewing machine.
If you are a beginner, we advise you to make the pattern without the options: pockets, inner briefs - which make assembly more complicated.

The shop also sells the right textiles to make these shorts. All you have to do is get started!

The Idonim patterns are easy to understand and use. A step-by-step guide with photos will accompany you during the making of the shorts.

You will also find some additional tips and tricks for choosing your supplies (type of needle, appropriate textiles, assembly techniques ...)

Pattern and instructions available in English and French; downloadable or in paper format.

The pattern is sold with its instruction booklet for sizes 38 to 48 (FR) / S to XXXL inclusive (2 to 7 international sizes)

You'll find the fabric in a range of colours in the men's swimwear section of the shop, as well as a kit for making the inner briefs.

Select options This product has multiple variants. The options may be chosen on the product page