Ultimate Gel Armrests offer maximum comfort with thick gel cushioning. The outer material is soft, breathable and durable. These armrests are 10" Long x 3.5" Wide. The top support surface is flat and the edges are smoothly rounded. This product is compatible with office chair arms that have either 4" or 5.5" center to center screw hole spacing, attachment screws are included for Free. Ultimate Gel Armrests are also compatible with many wheelchairs. Click on the pictures below to view product dimensions and details. Pricing is per complete pair (right and left), specify a Qty of 1 for 1 pair.. a Qty of 2 for 2 pair.. etc. Fast shipping. Satisfaction guaranteed, if product does not meet your needs, just return within 30 days for a refund (shipping is not refundable). If you have any questions, please call toll free.