In fashion, as at the roller disco, what goes around comes around—often in garish colors and excessive sequins. Keep your finest finery fitting for their second go-round with today's Groupon: for $9, you get $20 worth of clothing alterations at Alterations By Sarah.

The expert tailors at Alterations By Sarah take great care in changing the way clothing fits to reflect the metamorphosis of each unique human butterfly. Weight-related alterations are a specialty, so whether clients have recently lost inches of waist from a bout of avian pants flu or gained a few pounds after a pork-pie-eating competition, Sarah will return their tweaked, trimmed, and torqued threads to body-complementing fittedness. Pants—which can be hemmed while customers wait—are $8.50 a pair for hem reconstruction, $9.50 for cuffs, and $12.50 for a waist resizing. Skirt and dress hemming range from $12 to $28, and suit jackets can be sleeve-tweaked or shortened for $20.

For military personnel, the hem emporium features special services, with patch and insignia attachment for $2.49 apiece. Alterations are personally guaranteed by the master cloth transmogrifier herself, and afford clients the inalienable right to wear pants that fit as well as clown pants that don't fit. Alterations are vastly cheaper than kidnapping an entirely new wardrobe. They are also a great way to get a tailored fit for back-to-school garments and vintage clothing, except purple leisure suits, which are still banned in 27 states.

Though Alterations By Sarah sometimes features a discounted price online, this Groupon still offers the best deal available.