We have two styles of hangers, top and clip and they both come in two sizes, kids and adults. The kids sizes will fit clothes from teeny baby size all the way up to around age ten. The adult size is great for tween and upwards. 

The Kids Top Hangers:
Height 6.9"
Width 12"

The Kids Clip Hangers:
Height 4.7"
Width 9.8"

Adult Top Hangers:
Height 7.9"
Width 15.2"

The Adult Clip Hangers:
Height 4.7"
Width 13.8"

The top hangers come in a pack of 10.
The clip hangers come in a pack of 5.

Yep absolutely, they are designed to fit perfectly in our lockers with hanging rails.

Here's our suggestions for how many work well for our lockers:
The Skinny • 3-5 sets
The Twinny • 5-6 sets per rail
(You can mix + match them with clip hangers too!)