What you need to concern yourself with when purchasing crib sheets is that the suckers stay on nice and snug. Sheets that are are not pre-washed by the manufacturer are likely to shrink. Those that only have sections of elastic rather than elastic encompassing the sheet may also refuse to stay in place.
To better prevent this from occurring, look for sheets that have elastic that goes the whole way around the sheet, not just at the corners. Ideally, 100% cotton sheets will hold up the best after repeated washings, though they may tend to be a bit wrinkly when coming out of the drier. If that bothers you, look for cotton blend sheets that have a higher ratio of cotton.
A very practical suggestion is to give your sheets a test run. Wash them several times according to the manufacturer’s instructions. If after repeated washings you must fight with them to stay on, return them to the store.
Finally, you can check out special crib sheets designed specifically with safety in mind. Some of these sheets slip on the mattress like a pillowcase, others have unique device that attach the sheet to the mattress.
While baby bedding certainly can set the tone for the nursery, you may find that you just rather not use some of these items. There are other ways for you to celebrate the theme of the nursery without relying on products that may affect your baby’s safety. Whatever you choose to buy and to use, make sure you consider how well it will do its intended job.