I bought a dozen eggs at the grocery store.

Eggs are sold by the dozen.

There are dozens of books on the shelf.

I bought half a dozen eggs at the grocery store.

I bought a half-dozen eggs at the grocery store.

I bought a long dozen of eggs.

These cheap knockoffs are a dime a dozen.

I bought a baker's dozen of bagels for the party.

I try to do the daily dozen exercises every morning.

I bought a half dozen eggs from the grocery store.