WordNet (r) 3.0 (2006):

ready-to-wear
    adj 1: (especially of clothing) made in standard sizes and
           available from merchandise in stock; "a ready-made
           jacket"; "ready-to-wear clothes" [syn: off-the-rack,
           off-the-shelf, off-the-peg, ready-to-wear]
    n 1: ready-made clothing; "she couldn't find anything in ready-
         to-wear that she liked"

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "ready-to-wear":
   assembled, bespoke, built, cast, constructed, crafted, created,
   custom, custom-built, custom-made, cut-and-dried, cut-and-dry,
   extracted, fabricated, fashioned, forged, formed, gathered, grown,
   handcrafted, handmade, harvested, homemade, homespun, machine-made,
   machined, made, made to order, man-made, manufactured, milled,
   mined, molded, prefab, prefabricated, processed, put together,
   raised, ready-built, ready-dressed, ready-for-wear, ready-formed,
   ready-made, ready-mixed, ready-prepared, refined, sartorial,
   shaped, smelted, store-bought, tailored, vestmental, well-built,
   well-constructed, well-made