This cover only fits the IKEA Söderhamn 1 seat section with armrests, sold from 2012 to present. The cover for this model includes 7 pieces: 1 bottom frame, 1 seat cushion, 1 backrest, 1 back cushion,1 decorative cushion and 2 armrests. The IKEA Söderhamn series is modular so the various sections of the seating series can be connected together in different combinations or used separately as standalone pieces. The configuration is determined by you. To allow for this, our covers for Söderhamn models do not come with preset holes for assembly. If you have a connecting configuration, cut a small slit in the cover at connection points to accommodate the bolts. Remove the original IKEA slipcover before fitting the Bemz cover. Assembly required.