Delica beads are cylindrical in shape and have very thin walls, unlike other seed beads that are rounder, thick-walled seed beads. They line up perfectly in loom and in off-loom stitches such as Brick or Peyote, with the thin walls and large holes allowing for multiple thread passes through each bead. Delicas give curved stitches such as a Spiral or Rosette a more angular shape and lend good definition to Herringbone weave projects.