the item NO.and the sizes (cm)as following :

YCP-A4 210*297

YCP-A3 297*420

YCP-A2 420*594

YCP-A1 594*841

YCP-A0 841*1189

YCP-006 500*700

YCP-007 700*1000

and there are three kinds  of the  width of the frame ,19mm 25mm 32mm

and the corner can be  straight and round .

click disply board series frame