thanks for the info.
Welcome to the Forums! Glad to have you aboard!
Micro-Mark.com and Model Expo sell some small scale rulers. The L.S.Starrett Co. makes some. I have their 6" steel ruler that has 1/16th, 1/8th on one side and 32nd and 64th on the other. I picked up a 12" stainless steel at either Home Depot or Lowes that has the same 1/64, 1/32, 1/16, 1/8 and cm on one side and a conversion table on the other for decimal sizes.
There is another company, Johnson Level & Tool Mfg. Co.,Inc. that makes all kinds of rulers of all sizes and materials. My wife has a few of theirs in different sizes that she uses in her window treatment business.
There is another small tool company that sells those but I can't remember the name right now. Maybe one of the other members will be able to help out.
Hope this helps. Good luck finding what you need.
Jim