From the release:
All the King's Men is pleased to present corn fields for your wargaming needs. Each pack contains 32 stalks with 4 earthen (resin) bases. The bases have 8 holes drilled in each and allow you to move rows around figures as needed.
Fully assembled, the stalks stand 2.25 to 2.5 inches tall. We use these for 54mm troops (shown), but they'd work just as well for 28s or 40s.
Each pack is $15 USD. You can find them on our Terrain page. Just scroll about halfway down the page.