1 seater: 70x70, 90x90, 90x70,110x110. 2 seater: 90x120, 70x150, 90x160, 110x160. 3 seater: 70x180, 90x180,110x180. 4 seater: 70x210, 90x210, 90x240, 110x210, 110x240. The extra part can be stuffed into the gap of your sofa to better fix your sofa cover.
eBay