This item was used in a child's room and is generally discolored (used for about a year). ◎ Non-slip backing ◎ Antibacterial, deodorizing, and soundproof processing ◎ Size: 55cm x 55cm x 1cm (thickness) ◎ Quantity: 8 pieces (4 pieces x 2 sets) Note: We cannot sell individual pieces. Please purchase only if you understand the condition of the item. m(_ _)m