Walkin' Wheels Full Support/4-Wheel SMALL Rear Leg Height & Pet Length:12" & 10-15" video-container iframe { position: absolute

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Medium w/c with 12″ wheels should order large size

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Rear Leg Height Pet Length (ATR) 3-6″ 10-15″ 7-8″ 10-15″ 9-13″ 10-15″ 15-25 lbs

Wheelchair Size Rear Leg Height Strut Wheel Medium* 10-12" 6" 8" Medium 13-14" 9" 8" Medium 15-18" 12" 8" Med/Large 14-16" 9" 12" Med/Large 17-20" 12" 12" Med/Large 21-22" 12" 16" *The Medium 6” strut and 8” wheel front attachment is also for the 44-70lb Corgi Wheelchair

Walkin' Wheels Full Support/4-Wheel SMALL Rear Leg Height & Pet Length:12" & 10-15" video-container iframe { position: absoluteMeasure the Rear Leg Height to the toe pad, ideally when your pet is laying down. Do not pull the leg tight; leave some natural bend. Measure your pets length or armpit to rump (ATR). 11 14 lbs Rear Leg Height Pet Length (ATR) 3 6 10 15 7 8 10 15 9 13 10 15 15 25 lbs Rear Leg Height Pet Length (ATR) 6 8 10 15 9 11 10 15 12 10 15