Nahanni Swimsuit

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Nahanni is an athletic swimsuit for water sports and summer fun! Includes the option of tankini or bikini top, and mid-thigh jammer or full coverage shortie bottoms with a full gusset and no front or back seam. All options can be made with or without side-panels for fun fabric combinations!

This swimsuit is designed for water sports and all-day play. The snug fit ensures the suit stays in place whether building sandcastles or doing cannon-ball jumps. The jammer bottoms in particular offer a unique bottom style that is comfortable for all types of water sports, and dance/gymnastics too.
Recommended Skill Level - Intermediate - Experience sewing with stretch fabrics is recommended.

Seam allowance is 3/8"(1cm) unless stated otherwise in the pattern, and is included in all measurements.

Required Supplies: sewing machine, stretch needle, 1/4" swim elastic for sizes 2-5, 3/8" swim elastic for sizes 6-12, 3/4" elastic for the waistband and bikini chest band, ballpoint pins or wonder clips, scissors and/or rotary cutter, measuring tape and/or cutting mat & ruler.
Suggested Fabric: Swim knit with minimum 60% stretch (fabric content 18%-20% spandex/Lycra), swim lining.  
Included in the pattern:
  • Sizes 2, 3, 4, 5, 6, 7, 8, 10, 12.
  • Easy to assemble pattern pieces.
  • Clear and efficiently nested pattern pieces, color coded by size.  All colors also print clearly in black ink.  No layers (individual size printing) on print-at-home or Large Format; Layers ARE included on Projector Files.
  • All measurements in both metric and imperial
  • Body measurements Sizing Guide to help obtain the proper fit for the child. 
  • Specific instructions on blending sizes.
  • Line drawings showing all options.
  • Linked table of contents, for reference and ease of use on digital devices.
  • Fabric requirements for all parts.
  • Full color photo tutorial with specific details (in English only) for each step and illustrations for additional clarity.
  • Hints and tips throughout the tutorial.
  • Summary of steps for quick reference.
  • Modeled photos showing the finished options.

Purchase also includes AO Large Format PDF for copy shop printing, and a separate Projector optimized file.  Print-at-home and Large Format files have nested pattern pieces (no layers); Projector file has layers (ability to turn on and off individual projected sizes).

NOTE: This is a pattern, not a completed garment.

4 Reviews Hide Reviews Show Reviews

  • 5
    Nahanni swim suit

    Posted by Tasha on 2023 Apr 22nd

    Fab pattern and easy to follow

  • 5
    Not only is it good for swim but gymnastics and cheer as well!

    Posted by Danielle Oliver on 2021 Dec 30th

    My girls love being able to have cheer sets that fit their bodies. It can be so had to find something that fits in all the places needed. Store bought just does not cover my girls and stay in place. Nahanni is the best!

  • 5
    Super Cute

    Posted by Grace E. on 2021 Feb 7th

    Nahanni is super cute and surprisingly pretty quick! My daughter loves getting lots of compliments on the back.

  • 5
    We love this

    Posted by Danielle O. on 2019 Dec 6th

    We love this suit! The directions are easy to follow too!

Nahanni is a National Park Reserve in Canada’s North West Territories.  The centerpiece of the park is the South Nahanni River, which attracts adventure seekers like mountain climbers and white water paddlers.


Rugged and wild, Nahanni’s unique geology includes the Rabbitkettle Hot Springs… where the water deposits limestone structures called 'tufa mounds' that are so fragile that visitors are required to walk barefoot.  The of the park comes from the indigenous Dene language name for the area "Nahʔa Dehé" which means "river of the land of the Nahʔa people".