You can find a size chart on every product page. The units are in inches and are pretty accurate.
Sure, just send us an email at firstname.lastname@example.org within 30 minutes of your purchase with your reason for cancellation and the order number, and we will process it right away. The order cannot be changed or cancelled once production has started. Any requests beyond the 30-minute window will not be processed.
Unfortunately, the answer is no, at the moment. All of our products are made-to-order, so please make sure you’ve chosen the correct size and style you want.