These arrow spine selection charts are only a guide and many things can affect what you need as a final arrow shaft spine. Have a read of the page Key Info For When Selection The Right Shafts, this explains many of them
Arrow Selection Chart For English Longbows
Wooden Arrow Spine Chart – English Longbow
Arrow Selection Chart For Thumbdraw / Thumbring Shooter – Asiatic Bows
Wooden Arrow Spine Chart – Thumbdraw
Arrow Selection Chart For American Longbows (ASL) / American Flatbows
Wooden Arrow Spine Chart – American Longbow_Flatbow
Arrow Selection Chart For Recurves
Wooden Arrow Spine Chart – Recurve
Aluminium (Easton) Arrows To ASTM Deflection Value To ATA Spine Values (lb)
Aluminium Arrows To ASTM And ATA Spine