Giro Size Guide: Helmets, Shoes, Gloves & Clothing
Find your Giro size. This guide covers Giro helmets (adult and youth), cycling shoes, gloves, and men's and women's clothing. Measure yourself following the guidance with each chart.
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Helmets
Wrap a measuring tape around your head, keeping the tape level from front to back. The helmet should fit with a little room when the fit system is loose, and sit low enough to protect your forehead without hindering your vision.
| Adult Size |
Head Circumference |
| S |
51 - 55 cm |
| M |
55 - 59 cm |
| L |
59 - 63 cm |
| XL |
63 - 65 cm |
| Universal Adult |
54 - 61 cm |
| Universal Womens |
50 - 57 cm |
| Universal X-Large |
58 - 65 cm |
| Youth Size |
Head Circumference |
| XS |
45 - 51 cm |
| S |
49 - 55 cm |
| Universal Child |
47 - 54 cm |
| Universal Youth |
50 - 57 cm |
Shoes
| EU Size |
US Mens |
US Womens |
| 36 |
— |
5 |
| 37 |
— |
6 |
| 37.5 |
— |
6.5 |
| 38 |
— |
6.5 |
| 38.5 |
— |
7 |
| 39 |
6.5 |
7.5 |
| 39.5 |
7 |
8 |
| 40 |
7.5 |
8.5 |
| 40.5 |
7.5 |
8.5 |
| 41 |
8 |
9 |
| 41.5 |
8.5 |
9.5 |
| 42 |
9.5 |
10.5 |
| 42.5 |
9.5 |
10.5 |
| 43 |
9.5 |
10.5 |
| 43.5 |
10 |
— |
| 44 |
10.5 |
— |
| 44.5 |
11 |
— |
| 46 |
12 |
— |
| 46.5 |
12.5 |
— |
| 47 |
13 |
— |
| 48 |
13.5 |
— |
| 49 |
14 |
— |
| 50 |
15 |
— |
Gloves
Wrap the tape around your hand at the widest part of the palm and lightly close your hand for hand width. Measure from the tip of your longest finger to the base of your palm at the wrist for hand length.
| Men's Size |
Hand Width |
Hand Length |
| XS (6) |
6.3" - 7" / 160 - 178 mm |
5.9" - 6.5" / 150 - 164 mm |
| S (7) |
7" / 179 - 200 mm |
6.5" - 7" / 165 - 179 mm |
| M (8) |
8" - 8.6" / 201 - 219 mm |
7" - 7.6" / 180 - 194 mm |
| L (9) |
8.7" - 9" / 220 - 234 mm |
7.7" - 8" / 195 - 204 mm |
| XL (10) |
9.25" - 9.8" / 235 - 249 mm |
8" - 8.6" / 205 - 219 mm |
| XXL (11) |
9.85" - 10" / 250 - 265 mm |
8.7" - 9.25" / 220 - 235 mm |
| XXXL (12) |
10.4" - 10.6" / 265 - 270 mm |
9.25" - 9.6" / 235 - 245 mm |
| Women's Size |
Hand Width |
Hand Length |
| S (6) |
6" - 6.7" / 155 - 169 mm |
6.3" - 6.7" / 160 - 169 mm |
| M (7) |
6.7" - 7.4" / 170 - 189 mm |
6.7" - 7.2" / 170 - 183 mm |
| L (8) |
7.4" - 8" / 190 - 204 mm |
7.3" - 7.7" / 185 - 195 mm |
| XL (9) |
8" - 8.3" / 205 - 210 mm |
7.7" - 8" / 196 - 205 mm |
| Youth Size |
Hand Width |
Hand Length |
| XS (3) |
5.2" - 5.6" / 133 - 142 mm |
5.9" - 6" / 150 - 154 mm |
| S (4) |
5.6" - 5.9" / 143 - 152 mm |
6" - 6.3" / 155 - 159 mm |
| M (5) |
6" - 6.4" / 153 - 162 mm |
6.3" - 6.5" / 160 - 165 mm |
| L (6) |
6.4" - 6.8" / 163 - 172 mm |
6.5" - 6.7" / 165 - 169 mm |
Men's Tops
| Size |
Chest |
Waist |
| XS |
33" - 35" / 83.8 - 88.9 cm |
27" - 29" / 68.6 - 73.7 cm |
| S |
35" - 37" / 88.9 - 94 cm |
29" - 31" / 73.7 - 78.7 cm |
| M |
38" - 40" / 96.5 - 101.6 cm |
31" - 33" / 78.7 - 83.8 cm |
| L |
41" - 43" / 104.1 - 109.2 cm |
33" - 35" / 83.8 - 88.9 cm |
| XL |
44" - 46" / 111.8 - 116.8 cm |
35" - 37" / 88.9 - 94 cm |
| XXL |
47" - 49" / 119.4 - 124.5 cm |
37" - 39" / 94 - 99.1 cm |
| XXXL |
50" - 52" / 127 - 132.1 cm |
39" - 41" / 99.1 - 104.1 cm |
Men's Bottoms
| Size |
Hip |
Waist |
| 28 (XS) |
33" - 35" / 83.8 - 88.9 cm |
27" - 29" / 68.6 - 73.7 cm |
| 30 (S) |
35" - 37" / 88.9 - 94 cm |
29" - 31" / 73.7 - 78.7 cm |
| 32 (M) |
38" - 40" / 96.5 - 101.6 cm |
31" - 33" / 78.7 - 83.8 cm |
| 34 (L) |
40" - 42" / 101.6 - 106.7 cm |
33" - 35" / 83.8 - 88.9 cm |
| 36 (XL) |
42" - 44" / 106.7 - 111.8 cm |
35" - 37" / 88.9 - 94 cm |
| 38 (XXL) |
44" - 46" / 111.8 - 116.8 cm |
37" - 39" / 94 - 99.1 cm |
| 40 (XXXL) |
46" - 48" / 116.8 - 121.9 cm |
39" - 41" / 99.1 - 104.1 cm |
Women's Tops
| Size |
Chest |
Waist |
| XXS |
30" - 31" / 76.2 - 78.7 cm |
22" - 24" / 55.9 - 61 cm |
| XS |
32" - 33" / 81.3 - 83 cm |
24" - 26" / 61 - 66 cm |
| S |
34" - 35" / 86.4 - 88.9 cm |
26" - 28" / 66 - 71.1 cm |
| M |
36" - 37" / 91.4 - 94 cm |
28" - 30" / 71.1 - 76.2 cm |
| L |
38" - 39" / 96.5 - 99.1 cm |
30" - 32" / 76.2 - 81.3 cm |
| XL |
39" - 41" / 99.1 - 104.1 cm |
32" - 34" / 81.3 - 86.4 cm |
| XXL |
41" - 43" / 104.1 - 109.2 cm |
34" - 36" / 86.4 - 91.4 cm |
Women's Bottoms
| Size |
Hip |
Waist |
| XS |
32" - 34" / 81.3 - 86.4 cm |
22" - 24" / 55.9 - 61 cm |
| S |
34" - 36" / 86.4 - 91.4 cm |
24" - 26" / 61 - 66 cm |
| M |
36" - 38" / 91.4 - 96.5 cm |
26" - 28" / 66 - 71.1 cm |
| L |
38" - 40" / 96.5 - 101.6 cm |
28" - 30" / 71.1 - 76.2 cm |
| XL |
40" - 42" / 101.6 - 106.7 cm |
30" - 32" / 76.2 - 81.3 cm |
| XXL |
42" - 44" / 106.7 - 111.8 cm |
32" - 34" / 81.3 - 86.4 cm |
| XXXL |
44" - 46" / 111.8 - 116.8 cm |
34" - 36" / 86.4 - 91.4 cm |
Socks
| Sock Size |
EU Shoe |
Mens US Shoe |
| S |
36 - 39 |
4 - 6.5 |
| M |
40 - 42 |
7.5 - 9 |
| L |
43 - 45 |
9.5 - 11 |
| XL |
46 - 48 |
12 - 13.5 |
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