The sets are composed of a pair of plates that make up the back and a pair of plates that make up the sides. The sets are raw, i.e. not glued and not calibrated, for all the available options you can choose and add to the cart from the drop-down menu that appears next to the product. Classical Guitar: Back 52cm x 19cm x 4mm (2 Pieces) Sides 75cm x 11cm x 3mm (2 Pieces) Acoustic Guitar: Back 55cm x 21.5cm x 4mm (2 Pieces) Sides 80cm x 12.5cm x 3mm (2 Pieces) Botanical classification Class: Magnoliopsida Family: Meliaceae Genus: Khaya Botanical name: Khaya spp. Wood of Indonesian origin, it is an ebony that ranges from brown to green, botanical name Diospyros Ebonasea, and its specific weight is approximately 1100 kg per cubic meter. It resembles African Blackwood in some ways, but is certainly more resistant .