Great vintage B. Blumenthal/Belding buttons. Rounded (sphere), shank back, 6 x 1/2", and 4 x 3/8".

I do combine shipping! Please reach out to me ahead of time for a custom bundle if you are planning on purchasing multiple items :D I'll do everything that I can to get shipping to its lowest/most efficient price :) OR you can add items to cart and click on 'REQUEST TOTAL' Button. I will also refund the difference if these options do not work out for you (I know it can be tedious).