You can get any size you want, but below is a simple table showing prices for paper sizes that will fit pre-made frames:
The prices listed in the above table are for the tangible print or original drawing as well as the non-watermarked, low-resolution digital file. The high-resolution digital file is $75 with a signed agreement that it's only for personal use.
I personally love the look of authentic antique frames. I have a lot of antique frames on-hand. You can see what I have on-hand here.
Whether you buy one from me, have one of your own, or want me to help you find one, email me first so we can work together. Then I'll give you a price and work within those dimensions.
For further questions, email me at firstname.lastname@example.org