The price is 1 pcs sofa cover, not all.every part of the sofa needs to be purchased separately The size of sofa covers you choose should be 20~30cm bigger than the Actual size of the sofa. The residual part can be hung down to protect the side of the Sofa or tucked under the sofa to prevent slipping. 1. Backrest If P < 60cm , you can choose 70x70cm If 60cm < P < 75cm , you can choose 90x90cm If P > 75cm , you can choose 110x110cm 2. Armrest Please choose armrest according to the dimension G*H 3. Seat Cover Please choose F*(E+20cm) 1PC;B*(A+20cm) 1PC; C*(D+20cm) 1PC