with a border? My work is going to hang some pictures of a trip to Alaska in June and the boss wants the framing to be like the others in the office. All of the other art work has a border around the picture 1/2 to 3/4 inch where the person signed it. I have looked at many and they only seem to do a border for smaller pictures but I am looking for larger 12x8.5 and maybe a 36x10.5... I have only been looking at sites so far including mpix, Shutterfly, even Walgreen, Staples, have not checked Office Depot (but they own Staples so I don't expect any difference)...
There are a handful of professional photo labs and printers in the US that you can look at. For my medium format negatives i get them developed at https://thedarkroom.com/ About 15 years ago I worked the winter season at https://www.whcc.com/ spotting gallery wraps off the printer before the got laminated. (When i moved to Minneapolis) Professional printers like this send you a couple free prints to confirm color balance with what you upload and work to make sure they retain your long term business. I don't print professionally often but i would give white house business as they are regional to where I am.
Interestingly enough - whcc was the only company to suggest that I ADD a border with Photoshop. No I use darktable but still - they were the only ones to suggest it. Looks like I can do what with a frame in darktable... Thanks for the suggestions johnsey.