915 x 610 x 0.8mm (fine, light natural colour, mostly for coaster backings)
915 x 610 x 3mm (fine, light natural colour, mostly for model railways and coasters)
915 x 610 x 8.5mm (chunkier, light natural colour, mostly for pinboards)
915 x 610 x 12mm (fine, light natural colour, mostly for expansion joints)