Specialty paper plus 1300g grey board paper Flat rectangular 10-piece set, color black and white with insulating layer sizes: 1#: 28*18.5*5 2#: 30*20*5 wechat 3#: 32*22.5*6 4#: 34*24.5*6.5 5#: 36*26.5*7 6#: 38*28.5*7.5 7#: 40*30.5*8.3 8#: 42*32*8.7 9#: 44*34.5*9.5 10#: 46*36.5*10