Iphone Photo Printing?

Hello guys, so, my gf's birthday is about to come, and i'm thinking about printing one of our photos that was taken with my Iphone 5S, to put on a frame.
The photo has this resolution:1280 x 960

Would it look good on a 15x20 digitalized photo? I think that 10x15 is probably too small.

It should look okay, but not super great.

It should look okay, but not super great.