A properly fitting helmet is important for safety and comfort while riding a bicycle.
Step 1. Measure your head.

Measure the circumference of your head with a tape measure. Place the tape measure slightly above the ear and bring it across the mid forehead completely circling the head about 1 inch above the eyebrows. Take several measurements to make sure you have the largest size. If you do not have a tape measure, use a string and measure it against a ruler.
Step 2. Choose your helmet. The chart below shows which helmets fit for each head size.
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45cm |
46cm |
47cm |
48cm |
49cm |
50cm |
51cm |
52cm |
53cm |
54cm |
55cm |
56cm |
57cm |
58cm |
59cm |
60cm |
61cm |
62cm |
63cm |
64cm |
45-49cm |
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45-52cm |
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46-50cm |
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47-50cm |
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47-54cm |
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48-51cm |
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48-52cm |
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48-55cm |
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49-53cm |
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50-56cm |
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50-57cm |
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50-57cm |
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50-57cm |
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52-54cm |
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52-56cm |
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52-56cm |
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52-56cm |
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55-57cm |
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55-60cm |
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56-60cm |
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58-60cm |
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58-62cm |
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60-64cm |
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