Stored inside and the thicker 1/4" so not the flimsy stuff from box store
I have only the ONE. size
At Home Depot the thickness is about half of these sheets
6- 10 sheets @ $75 ea
4 Full sheet $80 - min of 4 ( no tax)
2 sheets $85 EACH
Over 10 sheets $70 ea
Or $95 ( no tax ) per sheet for one
Each sheet is scratch free and is lined on both sides, and scratch free.