Synthethic whale baleen/boning diff. widths

You don't need boning caps, you can cut the boning with sturdy scissors and file them round to keep from getting sharp edges.

German Plastic Boning - 10mm x 1mm from CorsetMakingSupplies.com

Synthetic 4mm Whalebone Ideal for Bodies/corsets and Sleeve Supports 10 Yards

Whale bone vs Steel boning? : r/corsetry

Boning for Dressmaking: Types, Uses and Sewing Technique

Dawn's Corset Class – Boning basics

Boning in corsets: Everything you need to know – Miss Leather Online

Plastic Boning for Sewing, Corset Supplies

Found this on a beach in Kent, looks like an animal, any ideas? : r/animalid

Bonings for corsetry, which one should you choose? - Secret Times

Whalebone and its Substitutes

Plastic whalebone 7mm - Roda Traden AB

Learn Corset Making with Sew Curvy