  
   Size
   Without Frame
   Art Box
    Oak Frame
  
    S
    32 x 32
    33 x 33
    35 x 35
  
    M
    43 x 43
    44 x 44
    46 x 46
  
    L
    55 x 55
    56 x 56
    58 x 58
  
    XL
    68 x 68
    69 x 69
    71 x 71

All dimensions are in centimetres