GUL MENS GARMENT SIZE CHART.
| Size | Height | Chest | Waist | Hips |
| X-Small | 5'2"-5'4"(156-!62)cm | 32"-34"(81-86cm) | 23"-25"(58-64cm) | 30"-32"(76-81cm) |
| Small | 5'4"-5'6"(162-167cm) | 34"-36"(86-89cm) | 27"-29"(69-74cm) | 32"-34"(81-86cm) |
| Medium | 5'8"-5'10"(172-177cm) | 38"-40"(97-102cm) | 31"-33"(79-84cm) | 36"-38"(91-(7cm) |
| Large | 6'-6'2"(182-187cm) | 42"-44"(107-112cm) | 35"-37"(80-94cm) | 40"-42"(102-107cm) |
| XLarge | 6'2"-6'4"(187-193cm) | 44"-46"(112-117cm) | 37"-39"(94-99cm) | 42"-44"(107-112cm) |
| XXLarge | 6'2"-6'4"(187-193cm) | 46"-48"(117-122cm) | 39"-40"(99-102cm) | 44"-46"(112-117cm) |
GUL LADIES GARMENT SIZE CHART.
| Height | Chest | Waist | Hips | |||||
| UK | USA | Europe* | Europe** | Italy | ||||
| 10 | 6 | 38 | 36 | 40 | 5'5"-5'6"(165-167cm) | 32"-34"(81-86cm) | 24"-26"(61-66cm) | 43"-36"(86-91cm) |
| 12 | 8 | 40 | 38 | 42 | 5'6"-5'7"(167-170cm) | 34"-36"(86-91cm) | 26"-28"(66-71cm) | 36"-38"(91-97cm) |
| 14 | 10 | 42 | 40 | 44 | 5'6"-5'7"(167-170cm) | 34"-35"(86-91cm) | 26"-28"(66-71cm) | 38"-40(97-102cm) |
| 16 | 12 | 44 | 42 | 46 | 5'7"-5'8"(170-173cm) | 36"-38"(91-97cm) | 28"-30"cm) | 40"-42"(102-107cm) |
* Europe(France,Spain,Belgium,Portugal.
** Europe(Sweden,Denmark,Austria,Netherlands,Chezh Republic.
GUL JUNIOR GARMENT SIZE CHART.
| Size | Age | Height | Chest | Inside Leg |
| Jnr/Small | 7-9 | 4'3"(129cm) | 26"-29"66-73cm) | 22"(56cm) |
| Jnr/Med | 9-11 | 4'7"(141cm) | 31-32"(78-80cm) | 24"(62cm) |
Jnr/Lge | 11-13 | 5'(153cm) | 32"-34"(80-87cm) | 27"(68cm) |
| Size | Height | Chest | waist | Hips |
| Small | 5'4"-5'6"(162-167cm) | 34"-36"(86-91cm) | 21"-29"(69-74cm0 | 32"-34"(81-86cm) |
| Medium Small | 5'6"-5'8'(167-172cm0 | 36"-38"(91-97cm) | 29"-31"(74-79cm) | 32"34"(81-86cm) |
| Medium Small Tall | 5'10"-6'(177-182cm) | 36"-38"(91-97cm) | 29"-34"(74-79cm) | 32"-34"(81-86cm) |
| Medium | 5'8"-5'10(172-177cm) | 38"-40"(97-102cm) | 31"-33"(79-84cm) | 36"-38"(91-97cm) |
| Medium Tall | 5'10"-6'(177-182cm) | 38"-40"(97-102cm) | 31"-33"(79-84cm) | 36"-38"(91-97cm) |
| Medium Large | 5'10-6'(177-182cm) | 40"-42"(102-107cm) | 33"-35"(84-89cm) | 38"-40"(97-102cm) |
| Large Short | 5'8"-5'10"(172-177cm0 | 42"-44"(107-112cm) | 35"-37"(89-94cm) | 40"-42"(102-107cm) |
| Large | 6'6"-6'2"(182-187cm) | 42"-44"(107-112cm) | 35"-37"(80-94cm) | 40"-42"(102-107cm) |
| X Large | 6'2-6'4"(187-193cm) | 44"-46"(112-117cm) | 37"-39"(94-99cm) | 42"-44"(107-112cm) |
| XX Large | 6'2"-6'4"(187-193cm) | 46"-48"(117-122cm0 | 39"-40"(99-102cm) | 44"-46"(112-117cm) |
GUL LADIES WETSUIT SIZE CHART.
| UK | USA | *Eur | **Eur | Italy | Height | Chest | Waist | Hips |
| 8 | 4 | 36 | 34 | 38 | 5'4"-5'5"(163-165cm) | 30"-32"(76-81cm) | 22"-24"(56-61cm) | 32"34"(81-86cm) |
| 10 | 6 | 38 | 36 | 40 | 5'5"-5'6"(165-167cm) | 32"-34"(81-86cm) | 24"-26"(61-66cm) | 34"-36"(86-91cm) |
| 12 | 8 | 40 | 38 | 42 | ||||
| 14 | 10 | 42 | 40 | 44 | ||||
| 16 | 12 | 44 | 42 | 46 |
GUL JUNIOR WETSUIT SIZE CHART.
| Size | Age | Height | Chest | Waist | Hips |
| XX Small | |||||
| X Small | |||||
| Small | |||||
| Medium | |||||
| Large | |||||
| X Large | |||||
| XX Large |
O'NEILL MENS WETSUIT SIZE CHART.
THE O'NEILL FIT:O'Neil has the best fit in the industry.One of the most important factors in buying a wetsuit is the fit.If a wetsuit does not fit right,it is not comfortable and will not keep you warm.It should be comfortably snug all over.If the suit fits too loose,there will be cold water entering the suit and you will never stay warm.A suit that is too small or too big can cause rashing.O'Neill's 50 years of wetsuit design and engineering ensures an excellent fit.
-If in-between sizes,go up a size.
| Size | Height | Weight | Chest |
| 2XS | 5'6"-5'8"(168-173cm) | 115-130lb(50-54kg) | 32"-34"(83-88cm) |
| XS | 5'7"-5'0"(170-175cm) | 125-140lb(57-64kg) | 34"-36"(88-93cm) |
| S | 5'8"-5'10"(173-178cm) | 135-159lb(61-70kg) | 36"-38"(93-98cm) |
| M | 5'9"-5'11"(175-180cm) | 150-170lb(68-77kg) | 38"-40"(98-103cm) |
| MS | 5'6"-5'8"(169-174cm) | 140-160lb(64-73kg) | 38"-40"(98-103cm) |
| MT | 6'1"-6'3"(185-191cm) | 160-180lb(73-82kg) | 38"-40"(98-103cm) |
| L | 5'10"-6'0"(178-183cm) | 170-190lb(77-86kg) | 40"-42"(103-108cm) |
| LS | 5'7"-5'9"(171-177cm) | 160-180lb73-82kg) | 40"-42(193-108cm) |
| LT | 6'2"-6'4"(188-193cm) | 180-200lb(82-(91kg) | 40"-42"(103-108cm) |
| XL | 5'11"-6'1"(180-185cm) | 190-210lb(86-95kg) | 42"44"(108-113cm) |
| XLS | 5'8"-5'10"(174-179cm) | 180-200lb(82-91kg) | 42"-44"(108-113cm) |
| XLT | 6'3"6'5"(190.5-195.5cm | 200-220lb(91-100kg) | 42"44"(108-113cm) |
| 2XL | 6'0"-6'2"(183-188cm) | 210-230lb(95-104kg) | 44"46"(113-118cm) |
| 3XL | 6'0"-6'2"(183-191cm) | 230-250lb(104-113kg) | 47"-49"(119-124cm) |
O'NEILL LADIES WETSUIT SIZE CHART.
| Size | Height | Weight | Chest |
| 4 | 5'4"-5'6"(63-168cm) | 100-120lb(45-54kg | 30"-32"(77-83cm) |
| 6 | 5'5"-5'7"(165-170cm) | 105-125lb(48-57kg) | 31"-33"(80-85cm) |
| 8 | 5'6"-5'8"(168-173cm) | 110-130lb(50-59kg) | 32'"34"(83-88cm) |
| 8T | 5'7"-5'9"(171-177cm) | 120-140lb(54-64kg) | 32"-34"(83-88cm) |
| 10 | 5'5"-5'7"(170-175cm) | 120-140lb(54-64kg) | 34"-36"(86-91cm) |
| 10T | 5'8"-5'10"(174-179cm) | 130-150lb(59-68kg) | 34"-36"(86-91cm) |
| 12 | 5'8"-5'10"(173-178cm) | 130-150lb(59-68kg) | 35"-37"(90-95cm) |
| 14 | 5'9"-5'11"(175-180cm) | 140-160lb(64-73kg) | 37"-39"94-99cm) |
| 16 | 5'11"-6'0"(180-183cm) | 160-180lb(73-82kg) | 38"40"(98-102cm) |
O'NEILL YOUTH, CHILD,TODDLER, WETSUIT SIZE CHART.
| Size | Height | Weight | Chest | |
| Youth | 10 | 4'7"-4'10"(140-147cm) | 75-90lb(34-41kg) | 28"-30"(71-76cm) |
| 12 | 4'10"-5'1"(147-155cm) | 90-105lb(41-48kg) | 29"-31"(74-79cm) | |
| 14 | 5'1"-5'4"(155-163cm) | 105-120lb(48-54kg) | 31"-33"(79-84cm) | |
| 6 | 5'4"-5'7"(163-170cm) | 120-135lb(54-61kg) | 33"-35"(84-89cm) | |
| Size | Height | Weight | Chest | |
| Child | 4 | 3'10"-4'1"(117-124cm) | 40-45lb(16-23kg) | 23"-25"(62-67cm) |
| 6 | 4'1"-4'4"(124-132cm) | 50-65lb(20-27kg) | 24"-26"(64-69cm) | |
| 8 | 4'4"-4'7"(132-140cm) | 60-75lb(27-34kg) | 26"-28"(66-71cm) | |
| Size | Height | Weight | Chest | |
| Toddler | 1 | 2'10"-3'2"(87.5-98cm) | 25-30lb(11-13.5kg) | 19"-21"(48-53cm) |
| 2 | 3'2"-3'6"(98-108cm) | 30-35lb(13.5-16kg) | 20"-22"(51-55.5cm) | |
| 3 | 3'6"-3'10"(108-117cm) | 35-40lb(16-18.5kg) | 21"-23"(53-58.5cm) |
O'NEILL CRASH VESTS AND SKI JACKET SIZE CHART.
| Men | Size | Chest(inches) | Chest(cm) |
| XS | 33-35 | 83.8-88.9 | |
| S | 35-37 | 88.9-94 | |
| M | 37-39 | 94-99.1 | |
| L | 39-41 | 99.1-104.2 | |
| XL | 41-43 | 104.2-109.2 | |
| 2XL | 43-45 | 104.2-114.3 | |
| 3XL | 47"1/2"-50"1/2" | 120.6-128.3 | |
| Women | Size | Chest(inches) | Chest(cm) |
| 4 | 30-32 | 76.2-81.3 | |
| 6 | 32-34 | 81.3-86.4 | |
| 8 | 34-36 | 86.4-91.4 | |
| 10 | 36-38 | 91.4-96.5 | |
| 12 | 38-40 | 96.5-101.6 | |
| Youth | Size | Chest(inches) | Chest(cm) |
| Infant | 00-30 | 00-13.6 | |
| Child | 30-50 | 14-23 | |
| Youth | 50-90 | 23-41 |