This set is made of 32 pieces of letters in SBS material: sticking on both sides, permanently removable and washable. This material sticks on all smooth, rigid, dry and clean surfaces: windows, mirrors, white boards, tiles, plastic doors.

One set is made of:
A bag with each 32 letters with alphabet composition: Height for one letter: 40 mm. Width from 20 till 35 mm. Thickness: 2 mm. 

Cleaning: 
When not or less sticking, wash it by hand with cold water and dry it with a lint-free cloth.
Do not use a washing machine.  Material sticks on itself when the product is not clean.