You can find frames designed for 4x5 inches, although they may need to be ordered as this is not a very common frame size. I am working on purchasing custom mats that can go inside a 5x7 frame.

The size of the original painting determines the ratios it can be printed at without cutting off some of the art.

Tuesdays and Fridays are the minimum days I have set for shipping. I work as a one-human team and some weeks may be busier than others. I will strive to ship out as quickly as possible, however my set shipping days are the minimum standard.

It depends on how you plan on displaying it. Many frames cover a small portion of the print, so a bordered print is better in that case. However, if you plan on using a clear case or leaving it in the protective film, then borderless may be the better option.