So I did what any normal person would do, decided to make my own buttons. I wasn't sure I could match the red, so I didn't want to do plain ones. I decided stars would be too crafty and a pain in the you know what to do. So i thought maybe stripes would work.
I realized that 5/8ths of an inch might be too big for the collar and cuffs, so I made three that were slightly smaller.
Next, I cut them out. I used my paper cutting shears. You need sharp scissors so get a clean edge.
After a minute or two you pull them out and let them cool. Turns out my circles were more ovally. Oops!Here they are all together. The one that is brighter is facing the right way. The others are with the wrong side up.