There is a variety of sizes in this lot of buttons. I truly do not know much about them so hard to describe. I think the pictures does a better job.
1 Dozen Vintage 2 Hole Half Squiggly Look Metal Buttons K3909
Antique Gentlemens Buttons, Utility Buttons, Vintage Suspender
Lot of 9 Vintage antique Militaires Equipements Brass 2-hole
Insignia Metal US US 1920's-30's Commercial Aviation Coat Button
EFORLED Mens 1920s Gatsby Costume Clothing Set
Lot of 9 Vintage antique Militaires Equipements Brass 2-hole Buttons
Vintage Small 9/16ths" Brass Metal Button Floral Plus Cut
Insignia Metal US US 1920's-30's Commercial Aviation Coat Button
Vintage Button Guide: Ways to Identify Antique Buttons - HobbyLark
Round Metal Button - Antique Brass - 11 and 15 mm – Quixotic Fibers
Vintage Small 9/16ths" Brass Metal Button Floral Plus Cut