The 47-pack of climbing holds is made of 21 small holds and 26 medium-sized handholds. This is an appropriate group of holds for children that are able-bodied. The kind of child that is already climbing on your kitchen counters and dressers.
The 21 small holds are tennis shoe friendly which means each hold offers at least 3/4" of protrusion from the wall.
The 26 medium-sized holds are the size of a tennis ball or smaller.
If you are choosing this set to equip a 64 square foot area, consider adding large jugs.