(1) The Mural is customized according to the size,please place the order refer the following caculation method:1 unit=1 square meter.The order unit=height*width(For example, you wall size is 3.5m*2.7m=9.45 square meter, you should place 10 square meter / 10 unit) . (2) Please leave a message for the width and height at the time of purchase, so we will prepare and quickly for your shipment! (3) No message for the size information ,we will send our default size as follow 16 default size available : Quantity 1 square meter = 125cm(W) x 80cm(H) (4’1” x 2'7") ft Quantity 2 square meter = 200cm(W) x 100cm(H) (6'7" x 3'3") ft Quantity 3 square meter = 200cm(W) x 150cm(H) (6'7" x 4'11") ft Quantity 4 square meter = 200cm(W) x 200cm(H) (6'7" x 6'7") ft Quantity 5 square meter = 250cm(W) x 200cm(H) (8'2" x 6'7") ft Quantity 6 square meter = 300cm(W) x 200cm(H) (9'10" x 6'7") ft Quantity 7 square meter = 330cm(W) x 210cm(H) (10'10" x 6'11") ft Quantity 8 square meter = 360cm(W) x 230cm(H) (11'10" x 7'6") ft Quantity 9 square meter = 380cm(W) x 240cm(H) (12'5" x 7'10") ft Quantity 10 square meter = 400cm(W) x 250cm(H) (13'1" x 8'2") ft Quantity 11 square meter = 420cm(W) x 260cm(H) (13'9'' x 8'6'') ft Quantity 12 square meter = 440cm(W) x 270cm(H) (14'5" x 8'10") ft Quantity 13 square meter = 460cm(W) x 280cm(H) (15'1'' x 9'2'') ft Quantity 14 square meter = 480cm(W) x 290cm(H) (15'9'' x 9'6'') ft Quantity 15 square meter = 500cm(W) x 300cm(H) (16'5'' x 9'10'') ft Quantity 16 square meter = 500cm(W) x 320cm(H) (16'5" x 10'6") ft (PS If there is no size you need Please note that the size you need is wide = ?M 、high =?m I will follow your production scale do not worry) Our wallpaper is self-adhesive, you don't need to use glue