Ready-made in a range of standard sizes (not tailor-made)(adjective)
Ready-made (of non-clothing items)(adjective)
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Use "off-the-peg" in a sentence
""We've seen a determined swing back to tailored clothes and a more grown-up style of dressing," observed Patrick Grant, owner of the Savile Row tailor Norton & Sons and the off-the-peg line E."
"Fergus O'Hare provides a clamorous soundtrack of birds and booms; John Napier's design features projections by Jon Driscoll and Gemma Carrington which sometimes glow alluringly – the domestic interiors are particularly inviting – but are often off-the-peg sepia: at one dramatically low moment, soldiers march on the spot in front of a photograph of the trenches, while an account of what is going on is delivered by our hero."
"Typically cut with a slightly forward collar, this is just one of hundreds of weaves and fabrics the firm offers in off-the-peg and made-to-measure shirting."