These are specifically for girls.
The youth's ones say, "my dad is LOUDER than yours." Sizes are S, M, & L. Prices are $18 each. I say they are specifically for girls because the font is...ummm... "girly."
The adult ones are fitted Ts, meaning the sleeves are a lil shorter than the average guys' Ts, and it's more form fitting. The text is "my husband is LOUDER than yours." Sizes are M, L, & XL. Prices are $22 each.
Prices include shipping to the continental United States.
How to check sizes: Take one of your kids' shirts or your wife's shirts, with garment laying flat, measurement across chest 1" below armhole. That's your chest width. Body Length: Length from shoulder to bottom edge. Take those measurements and use the following size charts:
Women'sCHEST:
16 Medium
17 Large
18 X Large
BODY LENGTH:
26 Medium
27 Large
28 X Large
Children'sCHEST:
16 Small
17 Medium
18 Large
BODY LENGTH:
20 Small
22 Medium
23 1/2 Large
Sorry about the quality of photos. Was taken with my phone. Here they are, nonetheless....