a long dozen
Thirteen, i.e., one more than a usual dozen (12). When Jacob went to the bakery to buy doughnuts for the office, he made sure to get a long dozen so he could have one to himself on the way to work. They have a sale on at the moment—a long dozen onion and garlic bagels for just $8.
long dozen
n. thirteen; a baker’s dozen. They used to give you a long dozen in that bakery.