modern double-sided transparent photo frame wholesale plant specimen box photo frame of density fiberboard photo frame european diy picture frame

3.5*5 inch [inner frame 8.9*12.7cm] 4*6 inch [inner frame 10.1*15.2cm] 5*7 inch [inner frame 12.7*17.8cm] 6*8 inch [inner frame 15.3*20.3cm] 8*10 inch [inner frame 20.3*25.4 cm] a4 [inner frame 21*29.7cm] square 6-inch [inner frame 15.2x15.2cm] square 7 inch [inner frame 17.9x17.9cm] square 8-inch [inner frame 20.2*20.2cm]

wood grain color walnut color