Yes. We sell membrane up to 36″ wide x 36″ long. If you need it 36″ wide and longer than 36″ then please contact us. Sometimes we have small rolls that we can sell you. Typically, stock pre-cut pieces of membrane in the most common sizes we have found our customers to need. We can cut it to fit whatever size you need. The more you purchase, the better the price. We sell a lot of different sizes here on our website so be sure to check that out. If you don’t see a size you need, then please contact us. To order custom cut silicone membranes click here.