How young is too young for a crop top?

For mini Swifties and future Alabama sorority girls, Dallas boutique Dear Hannah Prep is a pink and green balloon-filled wonderland. The store, little sister to the adult store Dear Hannah down the street, is stocked with everything a teenage girl might want to wear to house games, sleepovers, “Barbie” movie screenings or prom. school. Arranged in rainbow-colored piles are: gear emblazoned with “St. Tropez,” “Montauk” and “Slay,” stackable wristbands, tie-dye sweatshirts, mini shorts.

And crop tops. Lots and lots of crop tops.

For many tweens — and their parents — crop tops are a cute and innocent way to express their budding interest in fashion and body positivity. For others, they are inappropriate. Many schools have explicitly cracked down on them in recent years. Despite, or perhaps because of, their divisions, tween crop tops have become big business.