  
   Size
   Without Frame
   Art Box
  Oak Frame
  
    S
    40 x 30
    41 x 31
    43 x 33
  
    M
    52 x 39
    53 x 40
    55 x 42
  
    L
    68 x 51
    69 x 52
    71 x 54
  
    XL
    80 x 60
    81 x 61
    83 x 63

All dimensions are in centimetres