You can search by condition. For new clothes there are several options:
New
BNWOT – brand new without tags
BNWT – brand new with tags
Factory seconds
Under "condition" you have to keep expanding it to see all the options.
This is particularly true for women’s clothes but also for men’s. I bought one of my grown-up sons a sleep bundle (new and donated by Marks and Spencers):
One pair crisp checked cotton short with drawstring waistband and side slit pockets
Two pairs stretchy cotton shorts with drawstring waist, one dark blue, one grey,
One white t shirt top with three button front
One multi stripe t shirt
One plain white t shirt.
Great value for £19.99, particularly for M&S quality.
I also bought myself a Nike top - not brand new but excellent condition - great for my spinning class at the gym - a beautiful lime (my favourite colour) blouse, two really nice skirts. I had a really great shopping spree.
You can also search by brand and by size.
You’d need to keep a regular eye on it to see good things but a nice way to donate to Oxfam!
They don't charge postage, although they encourage you to make a donation. You can also return things you don't like. Do have a look and see if there is anything you want to buy.