White Star Line Summer Tunic

Hello Everyone and greeting from little Switzerland

I wrote you to ask information about the White Start Line Summer Tunic

I try to reproduce the Summer Tunic of the white Star Line

Unfortunately I don’t found any information how big (diameter) hast the Buttons

Summer Tunic.JPG

Could you maybe help me here?

Many Thanks in advance for your reply
The buttons should be standard Merchant Navy size. You could try on ebay where they are often sold, though WSL ones would be a bit rare I think. Cunard should be the same though, or very nearly similar. I believe the company that made them was called Buttons & Co, as that was what was on the reverse of the ones on my MN uniform.