O'Neill Wetsuits Size Guide

Find your ideal fit with our O’Neill wetsuit size guide. A properly fitting wetsuit helps keep you warmer, improves comfort and allows better movement in the water. Use the charts and guidance below to choose the best size for your needs.

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How Should an O’Neill Wetsuit Fit?

An O’Neill wetsuit should fit snugly against your body without large gaps or loose areas. It may feel tight when dry, but this is normal and helps reduce water entry. You should still be able to move freely, paddle comfortably and breathe without restriction.

How to Measure for an O’Neill Wetsuit

  • Height: Measure from the top of your head to your feet.
  • Chest: Measure around the fullest part of your chest.
  • Waist: Measure around your natural waistline.
  • Weight: Use your current body weight as a supporting guide.

O’Neill Wetsuit Size Charts

Use the size charts below to find your closest match. If you fall between sizes, consider how you plan to use your wetsuit and whether you prioritise warmth or ease of movement.

O'Neill Mens Wetsuit Size Chart

O'Neill Mens Wetsuit Size Guide

Size
Height Weight Chest Waist
(cm) (kg) (cm) (cm)
XXS 168 - 173 52 - 59 90 - 93 70 - 72
XS 170 - 175 57 - 64 93 - 95 72 - 75
SS 166 - 171 59 - 68 95 - 99 75 - 79
S 173 - 178 61 - 70 95 - 99 75 - 79
ST 183 - 188 66 - 75 95 - 99 75 - 79
MS 169 - 174 66 - 75 99 - 104 79 - 84
M 175 - 180 70 - 77 99 - 104 79 - 84
MT 185 - 191 73 - 82 99 - 104 79 - 84
LS 171 - 177 73 - 82 104 - 110 84 - 89
L 178 - 183 77 - 86 104 - 110 84 - 89
LT 188 - 193 82 - 91 104 - 110 84 - 89
XLS 174 - 179 82 - 91 110 - 117 89 - 94
XL 180 - 185 86 - 95 110 - 117 89 - 94
XLT 191 - 196 91 - 100 110 - 117 89 - 94
2XL 183 - 188 95 - 104 117 - 123 94 - 99
3XL 183 - 191 104 - 113 123 - 130 99 - 112
4XL 185 - 193 113 - 122 130 - 136 112 - 122

O'Neill Womens Wetsuit Size Chart

O'Neill Womens Wetsuit Size Guide

US Size UK Size Height Weight Chest Waist
(cm) (kg) (cm) (cm)
2 4 155 - 160 41 - 48 76 - 81 62 - 67
4 6 160 - 165 45 - 52 77 - 83 64 - 69
6S 8S 159 - 164 48 - 54 80 - 85 66 - 71
6 8 163 - 168 50 - 57 80 - 85 66 - 71
6T 8T 166 - 171 52 - 59 80 - 85 66 - 71
8S 10S 161 - 166 52 - 59 83 - 88 69 - 74
8 10 165 - 170 54 - 61 83 - 88 69 - 74
8T 10T 169 - 174 57 - 64 83 - 88 69 - 74
10S 12S 164 - 169 57 - 66 86 - 91 74 - 77
10 12 168 - 173 59 - 68 86 - 91 74 - 77
10T 12T 171 - 177 61 - 70 86 - 91 74 - 77
12 14 170 - 175 64 - 73 90 - 95 77 - 81
14 16 173 - 178 68 - 77 94 - 99 79 - 85
16 18+ 175 - 180 75 - 84 98 - 103 85 - 89

O'Neill Kids Wetsuit Size Chart

O'Neill Kids Wetsuit Size Guide

Size (Age) Height Weight Chest Waist
(cm) (kg) (cm) (cm)
1 88 - 98 11 - 13.5 48 - 53 45.5 - 51
2 98 - 108 13.5 - 16 51 - 56 48 - 53
3 108 - 118 16 - 18 53 - 58 51 - 56
4 118 - 126 18 - 25 58 - 64 51 - 56
6 126 - 133 22.5 - 29.5 62 - 67 55 - 60
8 133 - 141 27 - 34 66 - 71 58 - 61
10 141 - 147 34 - 41 71 - 76 58 - 61
12 147 - 155 41 - 48 74 - 79 64 - 69
14 155 - 163 48 - 54.5 79 - 84 69 - 74
16 163 - 170 54.5 - 61 84 - 89 71 - 76

What If I’m Between Sizes?

If you are between two O’Neill wetsuit sizes, choose the size that best matches your height and chest measurements. For surfing and colder water, a closer fit helps retain warmth. If you prefer a slightly easier fit for changing or casual use, you may prefer the larger size.

Signs Your Wetsuit Is the Wrong Size

  • Too big: gaps at the neck or lower back, loose material, water flushing through the suit.
  • Too small: restricted breathing, tight pressure points, limited shoulder movement.
  • Good fit: snug all over with no major gaps, comfortable movement and a close seal against the skin.

O’Neill Wetsuit Size Guide FAQs

Do O’Neill wetsuits fit true to size?

O’Neill wetsuits generally fit true to size, but checking your measurements against the size chart is recommended for the best fit.

Should an O’Neill wetsuit feel tight when dry?

Yes, O’Neill wetsuits should feel snug when dry. This helps reduce water movement inside the suit and improves warmth in the water.

What size O’Neill wetsuit should I choose if I am between sizes?

If you are between sizes, prioritise your height and chest measurements. A closer fit is usually better for warmth and performance.

Shop O’Neill Wetsuits

Now you’ve found your size, explore our full range of O’Neill wetsuits for men, women and kids, including summer and winter options for all conditions.

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O’Neill men’s wetsuits
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