A Miyuki Delica 15/0 measures approximately 1.3 mm in diameter and is slightly shorter in height. It is the smallest of the cylindrical Delica beads, significantly thinner than the Delica 11/0 (~2 mm).
Yes, and it’s even a technique favored by experienced beaders. In this case, 15/0 Delica beads are used to refine borders, create textural gradients, or add detail to specific areas within a main piece woven with 11/0 beads. The two sizes aren’t interchangeable row by row, but they complement each other very well.
A 5-gram bag of Miyuki Delica 15/0 contains approximately 1,700 beads.