AK Tie Backs Size Guide

This size guide covers the AK Tie Back Women's Swimsuit. Part of the all-new AK Essentials range — top-quality swimwear at an affordable unbranded price. The AK Tie Back features a fully adjustable tie back design to ensure a close and comfortable fit, made from high-quality Carvico Darwin PBT fabric for outstanding chlorine resistance, UV protection, and long-lasting shape retention.

Select your size using your chest, waist, and hip measurements. If measurements fall between sizes, speak to a member of staff at Allens who will be happy to advise.

✓ Adjustable Tie Back
✓ Carvico Darwin PBT Fabric
✓ High Chlorine Resistance
✓ Fully Lined
✓ UV Protection
✓ High Leg
Shop AK Women's Swimwear →
Body Measurement Points
AK Tie Back Women's Swimsuit body measurement points
How to Measure

Use a soft tape measure taken directly against your skin. If your measurements fall between sizes, speak to a member of staff at Allens who will be happy to advise on the best fit.

  • A
    ChestMeasure around the fullest part of your chest, keeping the tape horizontal and snug but not tight.
  • B
    WaistMeasure at the narrowest part of your natural waist, keeping the tape horizontal.
  • C
    HipMeasure around the fullest part of your hips and seat, keeping the tape horizontal.

All measurements are body measurements, not garment measurements. Speak to a member of staff at Allens if you are unsure.

Sizing Table — AK Tie Back Women's Swimsuit
Sizing XS / 28 S / 30 M / 32 L / 34 XL / 36 2XL / 38
International Size Equivalents
UK 28 30 32 34 36 38
USA 28 30 32 34 36 38
Spain (ES) 34 36 38 40 42 44
Italy (ITA) 38 40 42 44 46 48
France (FR) 36 38 40 42 44 46
Germany (D) 32 34 36 38 40 42
Body Measurements (cm)
A — Chest 78–82 82–86 86–90 90–94 94–98 98–102
B — Waist 58–62 62–66 66–70 70–74 74–78 78–82
C — Hip 82–86 86–90 90–94 94–98 98–102 102–106

All measurements are body measurements, not garment measurements. If your measurements fall between sizes, speak to a member of staff at Allens who will be happy to advise.

Fit Notes — AK Tie Back Women's Swimsuit
  • The adjustable tie back allows you to customise the fit across the shoulders — adjust the ties so the suit sits flat with no pulling or gaping at the back.
  • The suit should feel snug but comfortable — it should hold its shape against the body without restricting movement or breathing.
  • The high leg cut should sit comfortably at the hip with no pinching or riding up during swimming.
  • The Carvico Darwin PBT fabric is highly chlorine resistant and retains its shape over time — it will not sag or lose its elasticity with regular use.
  • The suit is fully lined for comfort and opacity — check that the lining lies flat with no bunching when the suit is on.
  • The built-in UV protection helps shield the skin during outdoor training and open water swimming.
  • Rinse in cold fresh water after every use. Hand wash gently if needed. Do not machine wash, tumble dry, iron, or bleach. Dry flat away from direct sunlight.
  • Unsure? Contact our team or call +44 1827 330600. Speak to a member of staff at Allens if you are unsure.
Frequently Asked Questions — AK Tie Back Women's Swimsuit

Measure your chest, waist, and hip using a soft tape measure directly against your skin. Compare all three measurements to the sizing table above. If your measurements fall between sizes, speak to a member of staff at Allens who will be happy to advise on the best fit.

If your measurements fall between two sizes, speak to a member of staff at Allens who will be happy to advise. The adjustable tie back also gives you some flexibility to fine-tune the fit across the shoulders, so a slightly larger size can often be adjusted to fit comfortably.

Carvico Darwin PBT is a premium Italian technical fabric widely used in competitive and training swimwear. PBT (polybutylene terephthalate) fibres are exceptionally resistant to chlorine and retain their shape and elasticity over time, unlike standard polyester or nylon fabrics. The result is a swimsuit that looks and feels as good after hundreds of sessions as it did when new.

The tie back straps can be adjusted by loosening or tightening the ties at the back of the suit before putting it on. Once on, fine-tune the tension so the suit sits flat across the shoulders and back with no pulling, gaping, or pressure. The ties should be secured with a bow that will hold in the water — avoid tying too tightly as this can cause discomfort during longer sessions.

Yes. The AK Tie Back is made from Carvico Darwin PBT fabric which is specifically designed for regular pool use. Its high chlorine resistance means it will retain its shape, colour, and elasticity far longer than standard swimwear, making it an excellent choice for daily training. The fully lined construction also ensures comfort and opacity throughout the session.

The AK Tie Back provides UV protection through the fabric construction, helping to shield your skin during outdoor training, open water swimming, and poolside activities. This makes it a versatile choice for both indoor and outdoor swimming. Always use additional sun protection on exposed areas for extended outdoor sessions.

Rinse the suit in cold fresh water immediately after every use to remove chlorine and salt. Hand wash gently if needed using a mild detergent. Do not machine wash, tumble dry, iron, or bleach. Dry flat away from direct sunlight — UV exposure during drying can degrade the fabric over time. Store in a cool, dry place away from rough surfaces.

The AK Essentials range offers top-quality swimming equipment and swimwear at an affordable, unbranded price. Every product in the range uses high-specification materials and construction — the AK Tie Back, for example, uses the same Carvico Darwin PBT fabric found in much more expensive branded swimwear. AK Essentials is designed for swimmers who want performance and durability without the premium brand price tag.