size;45*200cm weight;200g Ordinary chalk to write， eraser and wipe with a damp cloth can best effect damp cloth， clean， clean. Paste method: easy to use， the film opened at the end， you can paste. When posted side edge Jiedi paper paste， do not put the whole peeled off the backing paper paste; stick sideways， then， need two people， one person hold the blackboard affixed at one end， another person from the other end attached to the side edge Jiedi paper， towel back and forth up and down to catch the point， be careful not to have bubbles， stickers smooth the effects go! This is the third generation of wall stickers wall stickers， which can be torn off stickers， without transfer film