Some clothing patterns for preemies are Lorrabelle's gown by Careware and the Touching Little Lives preemie sleeper. Another pattern is the hospital shirt by Janet Wolfe.
The Lorrabelle's gown pattern is available in three different sizes for babies weighing between 1 and 8 pounds. The back ties closed with a ribbon. Both downloadable and printable, the preemie sleeper is simple to make. This garment is best made from interlocking knit fabric and fits babies who weigh 4 to 6 pounds.
Use the pattern on the Bev's Country Cottage website to crochet the hospital shirt from soft yarn. It fits babies weighing between 5 and 6 pounds.