There are times in Mingle when you want to show a list of text values, but have them represent numbers. A good example is a estimating a story's size using "shirt sizing" (S/M/L). The text label is just a handy shortcut for a numeric value.

Mingle's managed properties can either be text or number, but here's a trick for a hybrid solution:

(1) Make a numeric property (use "Allow any number", not a managed list)

(2) Create a project variable for each value you want in your list, associating each variable with the new property.

The result is shown below. The user can still enter another value, but most users will just choose one of the options in the menu.