For "L Shape" corner sofa cover or sectional sofa cover, you have to  buy 2/3 pieces

Item Name: Polar Fleece Sofa Cover

1 Seater: For Length 90-130cm Sofa

2 Seater: For Length 135-170cm Sofa

3 Seater: For Length 175-210cm Sofa

4 Seater: For Length 215-300cm Sofa

Package Info: 1 x Sofa Cover

P.S: For "L Shape" corner sofa cover or sectional sofa cover, you have to  buy 2/3 pieces, attached pls check the "HOW TO CHOOSE SOFA COVER" picture for your reference.