I could not find a box, but I found two deep frames at Michael's with a mat with a 4"x4" opening. So I cut 12 pieces of comic book board the size of the frame (5.5" square), marked the middle of each with a pin hole and then mounted them on the board. I used a sewing pin to go through the middle of the stitching and then through the pin hole I made in the middle of the comic book board. Carefully removing the pin and straightening out the stitching. It worked out great in centering the stitching.
I was then able to get 6 months in each deep frame (Jan - June and July - Dec). So I sent one with December showing in the frame and one with January showing. I forgot to put in a note of explanation so when we spoke on Christmas Day I let her know that all 12 months were there and that I had put a piece of ribbon in to help pull them up when time to change the month. Good thing we spoke, she did not realize and thought more might be coming for birthdays or future Christmases! They were a lot of fun to stitch, a little tricky finding the frames, but it all worked out great. I took a picture of all the months laid out and December in the frame.
Happy New Year Everyone!!