Please use the size charts below to ensure the correct fit of items purchased from 3rd Base Urban.

Waist
Measure around natural waistline
Hip
Measure around hip at the fullest part of buttocks.>
Arm Length
Arm length Only applicable for long sleeved shirts.
UK Size | Chest (cm) | Waist (cm) | Hip (cm) | Arm Length (cm) |
---|---|---|---|---|
XXS | 80 | 66 | 80 | 84.25 |
XS | 86 | 72 | 86 | 85.5 |
S | 92 | 78 | 92 | 86.75 |
M | 98 | 84 | 98 | 88 |
L | 104 | 90 | 104 | 89.5 |
XL | 112 | 98 | 112 | 91 |
2XL | 120 | 106 | 120 | 92.5 |
Size (EU) | Age | Shoulder (cm) | Chest (cm) | Length (cm) |
---|---|---|---|---|
92 | 1y – 2y | 28 – 28.5 | 29 – 32 | 37 – 39 |
104 | 3y – 4y | 29.5 – 30 | 31.5 – 34.5 | 38.5 – 42 |
116 | 5y – 6y | 31 – 31.5 | 34 – 37 | 42.5 – 46 |
128 | 7y – 8y | 32.5 – 33 | 36 – 39 | 46.5 – 50 |
140 | 9y – 10y | 34 – 35 | 38.5 – 41.5 | 50.5 – 54 |
152 | 11y – 12y | 36 – 37 | 41 – 44 | 58.5 – 62 |
164 | 13y – 14y | 37.5 – 39 | 44.5 – 47 | 61.5 – 66 |

This size chart is to determine your bottoms' size. If any of your measurement is on the borderline between two sizes, you can pick the smaller size for a tighter fit or the larger size for a looser fit.
If your hip and waist measurements correspond to two different suggested sizes, you should order the one which is indicated by the measurement of your hips.
Width (Inches) | Waist (cm) | Hip (cm) |
---|---|---|
W28 | 74 | 88 |
W30 | 79 | 93 |
W32 | 84 | 98 |
W34 | 89 | 103 |
W36 | 94 | 108 |
W38 | 99.5 | 113 |
W40 | 105 | 118 |
Length (Inches) | Inseam (cm) |
---|---|
L30 | 76 |
L32 | 81 |
L34 | 86 |
L36 | 91 |
L38 | 96 |
Width | Waist (cm) | Hip (cm) |
---|---|---|
XS | 69.5 - 74.5 | 83.5 - 88.5 |
S | 74.5 - 79.5 | 88.5 - 93.5 |
M | 79.5 - 85 | 93.5 - 98.5 |
L | 85 - 91 | 98.5 - 103.5 |
XL | 91 - 97 | 103.5 - 108.5 |
2XL | 97 - 103 | 108.5 - 113.5 |
Width (Inches) | Waist (cm) | Hip (cm) |
---|---|---|
W26 | 64.5 | 90.5 |
W27 | 69 | 93 |
W28 | 71.5 | 95.5 |
W29 | 74 | 98 |
W30 | 76.5 | 100.5 |
W31 | 79 | 103 |
W32 | 81.5 | 105.5 |
W33 | 84 | 108 |
W34 | 86.5 | 110.5 |
W35 | 89 | 113 |
Length (Inches) | Inseam (cm) |
---|---|
L28 | 71 |
L30 | 76 |
L32 | 81 |
L34 | 76 |
L36 | 91 |
Alpha | Numerical | Waist (cm) | Hip (cm) |
---|---|---|---|
XXS | 6 | 61 - 63 | 89 - 91 |
XS | 8 | 66 - 68 | 94 - 96 |
S | 10 | 71 - 73 | 99 - 101 |
M | 12 | 76 - 78 | 104 - 106 |
L | 14 | 81 - 83 | 109 - 111 |
XL | 16 | 86 - 88 | 114 - 116 |
Size (EU) | Age | Waist (inch) | Length (cm) |
---|---|---|---|
92 | 1y – 2y | 25 – 26.5 | 37 – 39 |
104 | 3y – 4y | 27 – 28.5 | 45.5 |
116 | 5y – 6y | 29 – 30.5 | 53 |
128 | 7y – 8y | 31 – 32.5 | 60 |
140 | 9y – 10y | 33 – 34.5 | 66 |
152 | 11y – 12y | 35 – 36.5 | 73 |
164 | 13y – 14y | 37 – 38.5 | 79 |

Foot Length
Place your heal against a wall or flat surface, place a ruler flat on the floor straight alongside the inside of your foot, from your heal to your toes. Place an object with a flat edge straight across your toes with the edge touching the tip of your longest toe. Take the measurement (in millimetres) from the ruler where the flat edge crosses. This is your foot length measurement.
If your foot measurement is halfway between sizes, select the larger size. You may find one foot is longer than the other, this is quite normal, please use the larger size when making your shoe size selection.
UK Size | Foot Length (CM) | US Size | EU Size |
---|---|---|---|
6 | 24.6 | 7 | 41 |
7 | 25.4 | 8 | 42 |
8 | 26.2 | 9 | 43 |
9 | 27.1 | 10 | 44 |
10 | 27.9 | 11 | 45 |
11 | 28.8 | 12 | 46 |
UK Size | Foot Length (CM) | US Size | EU Size |
---|---|---|---|
3 | 23.1 | 5 | 36 |
4 | 23.8 | 6 | 37 |
5 | 24.5 | 7 | 38 |
6 | 25.1 | 8 | 39 |
7 | 25.7 | 9 | 40 |
8 | 26.7 | 10 | 41 |