Plus-size and 24/7 heavy-duty office chairs are a true specialty category. The big and tall, plus-size office chairs in this section are rated for a weight capacity of 300 pounds. Some of these chairs are also rated 24/7 which includes heavy-duty office chairs that also have an added rating that warranties them for 24/7 use (more than the 40-hour work week). Most other office chairs carry weight limits of 250lbs. and their warranties cover using them 40 hours per week. If you do not see a weight specification listed on a product it's safe to assume that the weight limit is 250lbs. although some are only rated for 200lb. users. We make special efforts throughout our site to list the weight capacities on each product page. Certain manufacturers, such as Humanscale and Knoll build all their chairs to accommodate sitters in the 300-pound range and many are rated to be 24/7 office chairs. Browse our selection of heavy-duty chairs and bariatric office chairs below to find one that suits your needs and if you have any questions about their weight or 24/7 rating, please let us know.