Swimwear and Goggle Fit Guide

MAK Swimwear adult sizes follow standard UK sizing conventions. For women's swimsuits, we recommend measuring your chest (fullest point), waist (narrowest point), and hips (fullest point) and comparing against the size chart on each product page. If your measurements fall between two sizes, size up for comfort during long training sessions.

Men's jammers and briefs are sized by UK waist measurement. Measure around your natural waist (not your trouser waist) and refer to the size chart. Competition briefs are typically worn one size smaller than training jammers for a tighter, lower-drag fit — our product pages note this where relevant.

Performance swimwear is designed to fit more snugly than leisure swimwear. A small amount of initial tightness is normal and will ease slightly after the first few sessions as the fabric adapts to your body shape.

• Measure chest, waist, and hips for women's suits
• Measure natural waist for men's jammers and briefs
• Size up if between sizes for training; size down for competition
• Expect a snug fit — performance suits are not leisure swimwear

Junior swimsuits in the MAK range are sized by age group (7–8, 9–10, 11–12, 13–14, 15–16). These age ranges are a guide only — children develop at different rates, and a child who swims regularly may have a leaner, more muscular build than the age-group average.

For junior sizing, we recommend measuring chest and height and comparing against the size chart on the Junior Training Swimsuit product page. If your child is between sizes, size up to allow for growth and to ensure the suit is comfortable during longer training sessions. A suit that is too tight will restrict movement and may cause discomfort during drills and turns.

If you are buying a suit for a child who is growing quickly, sizing up by one age group is a sensible approach. The crossback design on our Junior Training Swimsuit accommodates a range of torso lengths without compromising the secure fit needed for competitive training.