[Taxacom] Scale for Botanical Specimens

[FUNAKOSHI, Hidenobu]

Dear botanists,


I am looking for a scale for taking pictures of plant specimens.
Black-based, drawn-by-white, ca.10cm scale like image below is preferred.

OLFA Top Sheet Cutter & Ruler
http://www.flickr.com/photos/7806221@N05/3441524318/

But this OLFA ruler is no more manufactured for these 10 years.

Does anybody suggest such scale supplier?


H.Funakoshi