NewsUK NewsFashionHigh Street retailers are cutting back on the number of clothes in the largest XL sizes, new figures show, as industry experts tell of a 'weight loss jabs effect'17:43, 06 Sep 2026Popular High Street brands are selling less plus size clothes as weight loss jabs boom in popularity, new figures show.‌GLP-1 medications, such as Wegovy and Mounjaro, are believed to be behind a drop in the very largest sizes being sold by major retailers - with the trend being reported both in the UK and across the pond.‌An estimated 5% of all adults in Britain - nearly three million people - are currently taking the injections, with analysts at PwC expecting usage to rise to about 13% (around 7 million people) by the end of next year.‌Around 60% are women, with one in ten aged 35-54 currently on the jabs.It has led to clothes retailers pulling back on their offerings in the furthest end of the plus size range - a shift away from the trend towards more offerings in larger sizes.H&M revealed plans at the end of August to discontinue 3XL and 4XL sizes due to a "fall in demand".‌Retail intelligence firm Edited meanwhile tracked listings of dresses on the websites of popular High Street brands - and found clear drops in larger sizes.The number of M&S dresses offered online in a UK size 18 or above fell from 34% in 2024 to 27% this year, while John Lewis saw a drop from 22% to 19%, reported the Telegraph.Investment bank Berenberg estimates that GLP-1 usage could provide a 1% boost to Britain's clothing market - due to slimmer patients needing to replace their wardrobes as they lose weight.‌It follows research this summer showing a similar trend in America.According to Edited, Mango reduced the proportion of new dresses in US sizes 16 to 20 to just 0.5% in the Spring-Summer 2026 season, down from 6.6% in its 2025 range.Boohoo was found to be reducing its own-brand extended sizes in US 14 to 20, and moving them into core sizes 2 to 12.Article continues belowRival Anthropologie also reduced its plus-size offerings from 10.5% to 9%.In a report, analysts said a "GLP-1 wave" was "fuelling double-digit cuts in extended ranges alongside a surge in core sizes" - and said there was evidence retailers were now offering more products with adjustable waistbands and hidden drawstrings to allow for fluctuations in size.Choose Daily Mirror as a 'Preferred Source' on Google News for quick access to the news you value.‌Marks & SpencerFashion