Converting craft sticks into plant markers should be a mass-production process, which means a fixture is in order:
Admittedly, making ten markers at once barely qualifies as “mass production”, but you (well, I) can think of it a proof of concept.
The basic shape comes from a 0.25 mm outset around the measured size of a craft stick (150×18 mm), plus an alignment target:
A good rule of thumb says never do any more work than absolutely necessary, so the rest of the fixture comes from linear arrays replicating the stick slots and targets:
The two strips over on the left (with a common cut down the middle) get glued to the underside of the fixture:
They’re exactly 5 mm apart to bracket one of the knife-edge bars supporting the fixture. The bar is upside-down to put its flat side upward:
Yes, the fixture is made of chipboard, mostly because it’s about the same thickness as a craft stick and it’s cheap & readily available. Each target gets an ink blot to make it more conspicuous; there is also a tiny hole burned through the chipboard at the center to mark the other side for the strips.
Two knife-edge bars (sharp side up) support the sticks near their ends, well out of the cutting path, to prevent scorch marks:
It’s worth noting the knife-edge bars are 5 mm wide and the platform spaces them on 3/8 inch = 9.525 mm centers. Not 10 mm, not 9.5 mm, exactly 3/8 inch. Kinda like the platform leadscrews: a 4 mm lead thread driven by a belt with 0.2 inch pitch. Only in America.
This doodle captures the key dimensions down there in the corner to work out where the strips should go:
Now, to convert names from a garden map into plant markers …
The Smell of Molten Projects in the Morning 
… why not just lay down a solid sheet of stickstoff and cut out the perimeter of each marker at the same time?
Craft sticks are probably a lot cheaper than sheets of the wood…
FWIW, much of my semiconductor days had to deal with mixed metric and ANSI measurements. Chip sizes were frequently millimeters in X and Y, and mils in thickness.
It was fairly early on (mid 1970s) that IC geometry dimensions went from fractions of a mil to microns (about the time that rubylith went obsolete–Thank You CAD people).
Because our Young Engineer left a couple of bags of craft sticks behind and these are way too big for mixing epoxy. :grin:
I’ve been more at peace with inches since I learned : “Since 1959 the inch has been defined officially as 2.54 cm.”
So when you use inches, you are really using metric anyway
Ah, but I loves me those integer sizes!