Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. “Plus size purchases are on the increase. If you look at the statistics, there’s more money being spent on plus size clothing now then there was even three years ago.”Why should we be penalised for being slightly bigger? A lot of retailers do this. Some retailers have claimed that plus size clothes need more fabric and that’s why it costs more. That’s basically rubbish.”I used to work for a plus size brand so I do understand a lot about how it works.”Ms Wassell, 43, had been browsing online when she spotted the green striped wide leg trousers were on sale for £19.99 in New Look’s standard, tall and petite ranges, yet for sizes 18 and above they were £22.99. A New Look spokesman said: “To ensure pricing differences like these don’t happen in future, we are in the process of reviewing the pricing structure of our plus size collection in a way which works best for our customers and our business.”We are proud of the ranges we offer to our plus size customers and value all customers, no matter what their body shape or size.” It’s discriminating against those customers who are largershopper Maria Wassell An apparently identical pair of trousers in New Look’s standard range cost £19.99Credit:Mercury Press She said she feels the retailer is alienating itself from vast swathes of shoppers by having price disparities on apparently identical items of clothing.Ms Wassell said: “I shop in the Curves range myself. I purchased a green striped top at the weekend from their plus size range and when I looked online that same top was £3 cheaper for those size 16 and under.”It’s discriminating against those customers who are larger. Even the trousers in their tall range, which would also require more fabric, are the same price as the normal ones. I’m annoyed.” New Look has been accused of imposing a “fat tax” after a shopper discovered a pair of trousers from its plus-size Curves range on sale for 15 per cent more than an apparently identical pair from the main collection.Retail supervisor Maria Wassell is now boycotting the High Street chain after she noticed the pricing difference when she browsed the rails at the Ashford branch.Ms Wassell, who has worked in retail for 26 years, said she was “absolutely disgusted” when she discovered a pair of green striped trousers were £22.99 in the Curves range, compared to £19.99 in the store’s standard range.The mother of two walked out of the store and went online, where she found a size 18 striped t-shirt emblazoned with the slogan “tres jolie” which she paid £12.99 for the previous weekend was being sold for just £9.99 in the standard range – a 30 per cent difference.New Look said it is in the process of reviewing the pricing structure of its plus-size collection. Ms Wassell contacted New Look and claimed she was told “some products appear similar but may be slightly different”. Ms Wassell, from Ashford, Kent, said: “It’s like I’m being discriminated against for being plus size when I’m only slightly bigger than average. The average size for a British woman is now a size 16.