Delicas are a type of seed bead made by Miyuki. The difference between a standard seed bead and a Delica is that the edges on a Delica are not rounded. These cylindrical beads feature a larger stringing hole that is more accessible, so a needle and thread can pass through multiple times for bead weaving purposes. Delicas are also incredibly uniform, which means they line up nicely when weaving with them. Miyuki Delicas are more expensive than other Delicas on the market, because they are the most consistent in size and shape.