Bought 3 dozen 125ml canning jars – but still have some more spices to get into the new jars – so I think I’ll get a dozen more. The can of chalkboard paint would probably do 100 dozen!
My daughter and I had a challenging time getting some of the spice names to fit – but it was fun.  We’ll have to be careful not to rub the names off too!
One thing I’ll have to remember is to burnish the painters tape down along the label edge. I’m also going to see if I can’t source a better quality chalk – one that might allow for a little better control, and maybe add some colour! 
After painting the 4 coats of chalkboard paint on the 36 jars, I came across these DIY Chalkboard stickers at Thinkgeek.com.  These might be an even better approach!