Foam Wheels (Set of 2) Size:4" Foam Wheels and Large wheelchairs

and Large wheelchairs

Size Girth of leg XXSmall 7″ or Less XSmall 7 – 9″ Small  10 – 11″ Medium   12 – 13″ Medium/Large 14 – 15″ Large 16 – 18″ XLarge 19 – 22″

as shown below:

while the Medium

Weight Rear Leg Height Wheel & Strut 11 — 14 lbs 3-6" 6" strut and 4" wheel 11 — 14 lbs 7-8" 9" strut and 4" wheel 11 — 14 lbs 9-13" 11" strut and 4" wheel 15 — 25 lbs 6-8" 6" struts and 8" wheel 15 — 25 lbs 9-11" 9" strut and 8" wheel 15 — 25 lbs 12-15" 11" strut and 8" wheel

Foam Wheels (Set of 2) Size:4" Foam Wheels and Large wheelchairsFoam Wheels Wheelchair Size Center Hole 4" Small & Medium Wheelchair Only 1 4" 8" Small & Medium Wheelchair Only 1 4" 12" Medium & Large Wheelchair Only 1 2" 16" Medium & Large Wheelchair Only 1 2"