We can recommend some companies that do printing in various sizes and formats:*
www.shutterfly.com for cards, calendars, photobooks, photo prints, etc.
www.sincerely.com for cards and postcards.
www.canvaspop.com for big prints—we’ve printed Waterlogue paintings at 4x4 feet and they look great!
Be sure to save the highest quality image when saving images for printing. See: How do I save the highest resolution images possible?
Finally: Some Waterlogue fans have put together creative tutorials on how to create, print and display Waterlogue images.
Freeborboleta: Printing Waterlogue Pictures
Shine Your Light: Create a Triptych with a Waterlogue Picture
A Mother’s Craftuition: DIY Photo Canvas
Pretty Handy Girl: How to Cut an Art Mat Like a Pro
Working on My Forever: Hallway Gallery Wall Using Waterlogue
Mountain Modern Life: Create DIY Wall Art Using Waterlogue
House of Earnest: Watercolor Art Without Pain
On Sutton Place: DIY Fall Watercolor Printables
MomAdvice: How To Print Waterlogue Pictures
*We don’t have any connection with these third-party print services, but have used them in the past for our own printing needs.