Steel curved needles are most commonly used in Coptic and other book structures. Three sizes are available, indicated by the diameter of the curve.
Books by Hand Bookbinder's Curved Needles
18 Bookbinding Needle, Blunt, 6 pack
Book Binding Supplies and plate holders
Badger and Chirp: Bookbinding 101: Needles
Curved needle hi-res stock photography and images - Alamy
Book Binding Supplies and plate holders
Books by Hand Binders Needles
Bulk Loose Needles: Bookbinders Needles
My Favorite Straight Bookbinding Needles for New or Establis