Yes, you can use cases that are not listed on our site, but you will have to measure and enter accurate dimensions and weights when booking. On our site, we have pre-populated popular cases with which we have had good experiences shipping.
Your case may not be listed because 1) we haven't heard of it; 2) we don't have any experience with it; or 3) because it is not suitable for shipping based on our experience. If your case is not listed, please contact our Support Team, and we'll be happy to consider adding it to our list if it's suitable for shipping. You may also save your case to your account.