Amazon has organic sheets as part of their Amazon Basics line! You can order all sizes of these Pinzon 100% organic cotton, GOTS certified sheet sets including Twin, Twin XL, Full, Queen, King and California King. Choose from 6 neutral colors.
These sheets are very highly reviewed. Amazon has some mark downs on certain colors and sizes. I found King sheets in the Natural color for just $47.59, which is an awesome price! Some colors of the full set are marked down to $33.99 and the white queen sheet sets are down to $39.09! Even their regular prices are low compared to other retailers, if you prefer a different size or color.
You can check out all of Amazon’s organic sheet sets here.