What's the best photo printing service for iPhone pictures?

Episode 1074 (1:26:40)

Randy from Hermosa Beach, CA

Randy is an amateur photographer and he's got a few great images on his iPhone that he wants to blow up larger than a poster. Leo says that a camera phone only has so much data, so it may not look great blown up. 14x19 is probably the sweet spot. The larger he goes, the more defects he'll see in the image. Apple's own photo service is very good, so Leo recommends using that.