Clothing creates the illusion that bodies fit an aesthetically pleasing norm. And that illusion depends on getting the fit right. Garments that bunch, pull, or sag call attention to figure flaws and often make people look worse than they would without clothes.

The Dallas model, prominent in the South and Southwest, sees a growing population as a sign of urban health. Cities liberally permit housing construction to accommodate new residents. The Los Angeles model, common on the West Coast and in the Northeast Corridor, discourages growth by limiting new housing.

Fit experts envision a future in which you'd carry your body scan in your cell phone or on a thumb drive, using the data to order clothes online or find them in stores. But who's going to pay for all those scanners, which cost about $35,000 each, and the staff to run them?

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