Did you ever wonder why hot dogs come 10 to a pack but buns come in packs of 8?

According to Readers Digest, hot dogs are sold by the pound and standard-sized hot dogs sold in stores weigh 1.6 ounces, so of course, ten is the perfect number for a package. This started in 1940 and remains so today.

Now to the buns. This time it’s not the weight but the baking pans! According to the National Hot Dog Sausage Council (NHDSC), “Sandwich rolls, or hot dog buns, most often come eight to the pack because the buns are baked in clusters of four in pans designed to hold eight rolls.”

To celebrate National Hot Dog Month in July, Condiment King Heinz is beginning a campaign called the Heinz Hot Dog Pact to finally make big hot dog companies agree on a single number of products per package: ten.