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Measure the circumference of calf and thigh approximately 8" or 20cm above and below the center of the knee.

Thor Sentinel Knee Guard Sizing

Size	Thigh (in)	Calf (in)
SM/MD	16-19	13-15
LG/XL	19-22	15-17
2XL/3XL	22-25	17-19

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

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