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DECATHLON

Men’s swimming trunks 900 b-fast black

Men's trunk-style swimwear, designed using the best fabric to ensure excellent chlorine-resistance and optimal comfort.

Size Guide

Size Guide

Size Guide

MEN'S
Find My Size
IN CM
Find Size
Tops
UK Size Chest (in) Waist (in)
XS 33.1 – 34.3 27.6 – 28.7
S 34.6 – 35.8 29.1 – 30.3
M 36.2 – 37.4 30.7 – 31.9
L 37.8 – 40.6 32.3 – 35.0
XL 40.9 – 44.5 35.4 – 39.4
2XL 44.9 – 48.4 39.8 – 43.7
3XL 48.8 – 53.1 44.1 – 48.4
Bottoms
UK Size Low Hip (in) Waist (in)
XS 31.5 – 33.5 26.0 – 28.0
S 33.9 – 35.8 28.3 – 30.3
M 36.2 – 38.2 30.7 – 32.7
L 38.6 – 40.9 33.1 – 35.0
XL 41.3 – 43.7 35.4 – 38.2
2XL 44.1 – 46.5 38.6 – 41.3
3XL 46.9 – 49.6 41.7 – 44.5
HOW TO MEASURE:

1- Head: Wrap a tape measure around your head, above your eyebrows. Make sure it is parallel to the floor when you're looking straight ahead.

2- Chest: Wrap a tape measure around your back and measure the fullest part of your chest. Make sure it's straight and parallel to the floor. Look straight ahead, tighten the tape and breathe normally.

3- Waist: Wrap a tape measure around the narrowest part of your waist, above your belly button. Raise your head, tighten the tape and breathe normally.

4- Hand: Hold a tape measure at the bend of the thumb. Wrap around your palm.

How to measure
WOMEN'S
Find My Size
IN CM
Find Size
Tops
UK Size Low Hip (in) Waist (in)
2XS 31.5 – 32.7 22.8 – 24.4
XS 33.1 – 34.3 24.4 – 25.6
S 34.6 – 35.8 26.0 – 27.2
M 36.2 – 37.4 27.6 – 28.7
L 37.8 – 40.6 29.1 – 33.1
XL 40.9 – 44.5 33.5 – 37.8
2XL 44.9 – 48.4 38.2 – 42.5
Bottoms
UK Size Low Hip (in) Waist (in)
2XS 31.1 – 33.5 23.6 – 24.8
XS 33.5 – 35.4 25.2 – 26.8
S 35.4 – 37.8 27.2 – 28.7
M 37.8 – 40.2 29.1 – 31.1
L 40.2 – 42.5 31.5 – 33.9
XL 42.5 – 44.9 34.3 – 36.6
2XL 44.9 – 47.2 37.0 – 39.4
Bra
UK Size Bust (in) Underbust (in)
2XS 30.7 – 31.5 24.8 – 26.4
XS 31.5 – 33.5 24.8 – 28.3
S 33.5 – 35.4 26.8 – 30.3
M 35.4 – 37.4 28.7 – 32.3
L 37.4 – 39.4 30.7 – 34.3
XL 39.4 – 41.3 32.7 – 36.2
2XL 41.3 – 43.3 34.6 – 38.2
HOW TO MEASURE:

1- Head: Wrap a tape measure around your head, above your eyebrows. Make sure it is parallel to the floor when you're looking straight ahead.

2- Bust: Wrap a tape measure around your back and measure the fullest part of your bust. Make sure it's straight and parallel to the floor. Look straight ahead, tighten the tape and breathe normally.

3- Underbust: Directly below the bust, wrap a tape measure around the ribcage. Make sure it's straight and parallel to the floor. Raise your head, tighten the tape and breathe normally.

4- Waist: Wrap a tape measure around the narrowest part of your waist, above your belly button. Raise your head, tighten the tape and breathe normally.

5- Hips: Wrap a tape measure around the fullest part of your hips.

6- Hand: Hold a tape measure at the bend of the thumb. Wrap around your palm.

How to measure
KIDS'
Find My Size
IN CM
Find Size
Boys
Age Height (in) Chest (in) Waist (in) Low Hip (in)
6 months 24.0 – 27.2 16.5 – 16.9 14.6 – 15.2 16.5 – 17.1
9 months 27.6 – 28.3 16.9 – 17.3 15.2 – 15.6 17.1 – 17.7
12 months 28.7 – 29.5 17.3 – 17.7 15.6 – 16.1 17.7 – 18.5
18 months 29.9 – 31.9 18.1 – 18.5 16.3 – 16.9 18.5 – 19.3
24 months 32.3 – 34.6 18.9 – 19.3 17.3 – 18.1 19.3 – 20.3
2 – 3 years 35.0 – 37.4 19.7 – 20.1 18.1 – 18.9 20.3 – 20.9
3 – 4 years 37.8 – 40.2 20.5 – 21.3 19.3 – 20.1 21.3 – 22.4
4 – 5 years 40.6 – 44.1 21.7 – 22.4 20.1 – 20.9 22.8 – 24.0
5 – 6 years 44.5 – 48.0 22.8 – 23.6 20.9 – 21.7 24.4 – 25.6
7 – 8 years 48.4 – 51.2 24.4 – 24.8 21.7 – 22.4 26.0 – 27.2
8 – 9 years 51.6 – 55.1 25.2 – 26.4 22.8 – 23.6 27.6 – 28.7
10 – 11 years 55.5 – 59.1 26.8 – 28.7 24.0 – 25.2 29.1 – 30.3
12 – 13 years 59.4 – 63.0 29.1 – 31.5 25.6 – 27.2 30.7 – 33.1
14 – 15 years 63.4 – 67.7 31.9 – 34.6 27.6 – 29.1 33.5 – 35.8
Girls
Age Height (in) Chest (in) Waist (in) Low Hip (in)
6 months 24.0 – 27.2 15.4 – 16.9 13.4 – 15.2 15.4 – 17.1
9 months 27.6 – 28.3 16.9 – 17.3 15.2 – 15.6 17.1 – 17.7
12 months 28.7 – 29.5 17.3 – 17.7 15.6 – 16.1 17.7 – 18.5
18 months 29.9 – 31.9 18.1 – 18.5 16.3 – 16.9 18.5 – 19.3
24 months 32.3 – 34.6 18.9 – 19.3 17.3 – 18.1 19.3 – 20.3
2 – 3 years 35.0 – 37.4 19.7 – 20.1 18.1 – 18.9 20.3 – 20.9
3 – 4 years 37.8 – 40.2 20.5 – 21.3 19.3 – 20.1 21.3 – 22.4
4 – 5 years 40.6 – 44.1 21.7 – 22.4 20.1 – 20.9 22.8 – 24.0
5 – 6 years 44.5 – 48.0 22.8 – 23.6 20.9 – 21.7 24.4 – 25.6
7 – 8 years 48.4 – 51.2 24.4 – 24.8 21.7 – 22.4 26.0 – 27.2
8 – 9 years 51.6 – 55.1 25.2 – 26.4 22.8 – 23.6 27.6 – 28.7
10 – 11 years 55.5 – 58.3 26.8 – 28.0 24.0 – 24.8 29.1 – 31.9
12 – 13 years 58.7 – 62.6 28.3 – 31.9 25.2 – 26.4 32.3 – 35.0
14 – 15 years 63.0 – 65.4 32.3 – 33.9 26.8 – 28.0 35.4 – 36.6
HOW TO MEASURE:

1- Height: Stand against a wall, barefoot or in socks, heels pasted to the wall. Stand right, then hold a book or flat object on the top of your head. Block the book, mark the bottom edge of the book. Measure the distance from the floor to the mark.

2- Head: Wrap a tape measure around your head, above your eyebrows. Make sure it is parallel to the floor when your head is straight.

3- Hand: Hold a tape measure at the bend of the thumb. Wrap around your palm.

How to measure
FOOTWEAR
Find My Size
IN CM
Find Size
Men's Footwear
UK Size EU Size Foot Length (in)
5.5 38.5 9.6
6 39 9.6
6 39.5 9.8
6.5 40 10.0
6.5 40.5 10.0
7 41 10.2
7.5 41.5 10.4
7.5 42 10.4
8 42.5 10.6
8.5 43 10.8
9 43.5 11.0
9.5 44 11.0
10 44.5 11.2
10.5 45 11.2
10.5 45.5 11.4
11 46 11.6
11.5 46.5 11.6
Women's Footwear
UK Size EU Size Foot Length (in)
2 34 8.25
2.5 34.5 8.5
3 35 8.7
3 35.5 8.9
3.5 36 8.9
4 36.5 9.1
4.5 37 9.3
5 38 9.4
5.5 38.5 9.6
5.5 39 9.6
6 39.5 9.8
6.5 40 10.0
6.5 40.5 10.0
7 41 10.2
7.5 41.5 10.4
8 42 10.4
Unisex Footwear
UK Women's / Men's EU Size Foot Length (in)
W3 / M2.5 35 8.6
W3.5 / M3 36 8.9
W4 / M3.5 36.5 9.1
W4.5 / M4 37 9.3
W5 / M4.5 37.5 9.3
W5.5 / M5 38 9.4
W6 / M5.5 39 9.6
W6.5 / M6 39.5 9.8
W7 / M6.5 40 10.0
W7.5 / M7 41 10.2
W8 / M7.5 41.5 10.4
W8.5 / M8 42 10.4
W9 / M8.5 43 10.8
W9.5 / M9 43.5 11.0
W10 / M9.5 44 11.0
W10.5 / M10 44.5 11.2
W11 / M10.5 45 11.2
W12 / M11 46 11.6
W13 / M12 47 11.8
W14 / M12.5 48 12.0
HOW TO MEASURE:

Foot length: Stand against a wall, heels touching the wall. Put an object (e.g. book) against your longest toe. Measure the length between the wall and the object. Repeat this process for the other foot. If the lengths are different, choose the largest.

How to measure
ACCESSORIES
Measurements
IN CM
Headwear (Caps, Beanies, Hats)
UK Size Head (in)
2XS 18.5 – 19.7
XS 19.7 – 20.9
S 20.9 – 22.0
M 22.0 – 23.2
L 23.2 – 24.4
Helmets
UK Size Head (in)
2XS 17.3 – 19.3
XS 18.5 – 20.5
S 20.5 – 21.7
M 21.7 – 23.2
L 23.2 – 24.4
Gloves
UK Size Palm perimeter (in) Hand length (in)
2XS 7.0 – 7.3 6.3 – 6.6
XS 7.3 – 7.6 6.7 – 6.9
S 7.6 – 7.9 7.0 – 7.2
M 8.0 – 8.2 7.2 – 7.4
L 8.3 – 8.5 7.4 – 7.7
XL 8.6 – 8.9 7.7 – 7.9
2XL 8.9 – 9.2 8.0 – 8.1
3XL 9.2 – 9.5 8.2 – 8.4
HOW TO MEASURE:

1- Head: Wrap a tape measure around your head, above your eyebrows. Make sure it is parallel to the floor when your head is straight.

2- Hand: Hold a tape measure at the bend of the thumb. Wrap around your palm.

BIKES
Measurements
IN CM
Kids' Bikes
Bike size Height
12" 2'5" – 3'0"
14" 3'0" – 3'5"
16" 3'5" – 3'11"
20" 3'11" – 4'5"
24" 4'5" – 5'1"
Road & Gravel Bikes
Bike size Height
XS 5'1" – 5'5"
S 5'5" – 5'8"
M 5'8" – 5'11"
L 5'11" – 6'2"
XL 6'2" – 6'7"
Mountain Bikes
Bike size Height
S 4'11" – 5'5"
M 5'5" – 5'9"
L 5'9" – 6'0"
XL 6'0" – 6'7"
Ref: 8648322
Size: UK 31" / FR 40
Color : black
6.000 OMR
Sold out
Home Delivery 4 - 6 Days
Up to 2-year warranty
Secure Payments