To choose your correct helmet size, please measure the circumference of your head 1" above your eyebrows around your head and refer to the size guide.

GDM™ DUKE HELMETS SIZE CHART

SIZES INCHES HAT SIZE CM
Small 21 5/8 -- 22 6 7/8 -- 7 55-56
Medium 22 1/2 -- 22 7/8 7 1/8 -- 7 1/4 57-58
Large 23 1/4 -- 23 5/8 7 3/8 -- 7 1/2 59-60
X-Large 24 -- 24 3/8 7 5/8 -- 7 3/4 61-62
2X-Large 24 3/4 -- 25 1/4 7 7/8 -- 8 63-64
*Please note that the size chart is for reference only and cannot guarantee a perfect fit. Please use this chart as a guide only.

GDM™ TEXTILE JACKET SIZE CHART

SIZES CHEST (in) WAIST (in) ARM (in)
Small 38-40 29-31 32
Medium 40-42 32-34 33
Large 42-45 34-36 34
X-Large 45-49 36-39 35
2X-Large 50-52 39-42 36
3X-Large 54-56 42-45 37
*Please note that the size chart is for reference only and cannot guarantee a perfect fit. Please use this chart as a guide only.

GDM™ MOTORCYCLE GLOVES SIZE CHART

SIZES HAND (in)
Small 7.5--8
Medium 8--8.5
Large 8.5--9
X-Large 9--9.5
2X-Large 9.5--10
3X-Large 10--11

*To find your correct glove size, wrap a cloth measuring tape around your hand behind the knuckles, not including the thumb, keeping the tape tight. Measure both left and right hands and use the larger of the two measurements.

**Please note that the size chart is for reference only and cannot guarantee a perfect fit. Please use this chart as a guide only.