500 x 500 mm, Mountboard Backs for Picture Mounts 30x21 Outer Size to fit a

Outer Size to fit a 15 x 15 inch frame - exact outer size 378mm x 378mm

50cm x 50cm

All colours are acid-free white-core mountboard

Custom details

Outer Size exactly 250mm x 250mm

500 x 500 mm, Mountboard Backs for Picture Mounts 30x21 Outer Size to fit aOuter Size exactly 500mm x 500mm 50cm x 50cm These backing boards are made from the same quality mountboard as our mounts. Essentially they are picture mounts with no window. Available in 4 pack sizes Select 'Pack of 1 (single)' 'Pack of 4' 'Pack of 6' or 'Pack of 10' from the options menu. Choice of colour On screen colours may not be true to life. Order colour samples here. Select your preferred colour from the options menu. All colours are acid