Applique needles are longer and more slender than general purpose sewing needles. Ideally, you will want to use the smallest needle for the thread diameter when hand appliqueing. The goal for anyone appliqueing by hand is to have an almost "invisible" approach to the process.
Bohin Applique Needles will help achieve this result.
Available in Standard (SIzes 11 and 12) and Long Needles ( Sizes 9, 10 and 12)