Greedy minds reflect: Why buy the cow if the milk is free? Why just have your cake, when you can eat it, too? And what’s so wrong with looking a gift horse in the mouth, anyway?

Karanina’s ingenious halter dress poses a similar question: Why wear one dress, when you can wear a dozen at once?

Made of lightweight silk, the extra-long straps on the convertible, ’70s-inspired frock arrange to create countless styles. The fitted bodice and full circle skirt flatter just about everyone.

What you do next is up to you. Baby got back? Wind the strands at your nape and let them trail behind you. (Braid them while you’re at it.) Feeling busty? Crisscross the back and tie in the front a la Marilyn. Want to hide your after-dinner tummy? Wrap the straps around your pudge. Stock up on bright colors like lime, cobalt, and tangerine for looks that will last all season.

Just act quickly, because the dresses are being snatched off the shelves in droves.

Oh, everyone else is greedy, too?

Talk about getting a taste of your own medicine.

Available at Girl Cat, 167 Elizabeth Street, between Spring and Kenmare Streets (212-219-1647). To see styles, go to karanina.com.