Wall Candy Circles
Wall Candy Chalkboard Animals
Etsy monthly calendar
Another monthly calendar found on Etsy
(these are a more interesting because the paint on the wall behind the decals will show through on the monthly title)
A shout out to my home state, found on Etsy
Lastly here is a link to a few more decal options. I could not grab any images from the website but they have a nice assortment or chalkboard decals along with a plethora of wall decal designs!