I installed on a 21 ft. I have arthritis in my feet, and these shoes have decent support. Super cute but WAY TOO SMALL! Las recomiendo sin duda y más aún, cuando se rompan, compraremos otras. But I love mine. A few days days later: These covers held my pods in place for my entire workout today which included, a jog, pull ups, dips, more jogging and repeat. One of the jars was missing a lid right out of the box. Using these cans I listened to many different genres from Classical, Jazz to HipHop and EDM. The headphones connect using a 3. For me, they plug into a single 3.