Instructions
Visit Portrait Puzzles to have a portrait made into a puzzle. You can choose from a variety of sizes, from just a few to more than a thousand. You'll need a digital image that you can upload for the puzzle.
Go to Puzzle World for what the site claims is the largest puzzle in the world at a whopping 24,000 pieces. It's called "Life, The Great Challenge" and measures 5 by 14 feet. Of course, finding a place to put it together might be particularly challenging. There are many other unusual puzzles, such as mystery jigsaws.
Try Simple Pastimes for some puzzles that you might want to hang on the wall when you're finished. These puzzles, from manufacturers like Springbok and Ravensburger, are more like works of art you have to assemble. The site offers classics to new releases.
Check out Puzzle Warehouse offers wooden jigsaw puzzles as well as traditional paperboard puzzles. Calling itself the "largest jigsaw puzzle store in the USA," Puzzle Warehouse offers tons of interesting puzzles and quite a few clearance puzzles for less than $10.
Visit Bits and Pieces for jigsaw puzzles and more. The site offers puzzle sets and accessories, as well as brain teasers that might take your mind off the jigsaws for awhile. Toys and games are also available.