This cover only fits the IKEA Vimle sofa series armrest. It includes one piece and attaches with velcro. The IKEA Vimle series is sectional/modular so the various sections of the seating series can be connected together in different combinations. The configuration is determined by you and Bemz makes covers to fit any configuration you've chosen. Remove the original IKEA Vimle armrest cover before fitting the Bemz slipcover. Can fit either left or right side. Assembly required.