I think it is necessary to put together this online shopping guide, in order to highlight all the websites you can check out to find plus size clothing and that deliver to most of the GCC and Middle East region.
I have all the solutions for you below!

 1. Boohoo MENA 
The UK high-street brand landed in the Middle East last year and what a delight it has been for all us! You can find trendy and more fashion forward pieces, that go up to size 26 UK. Subscribe to their newsletter, you will totally benefit from regular discount codes and offers.
https://mena.boohoo.com/

 2. Blush 
Blush is a Dubai based clothing brand that offers a wide range of fun, energetic and quirky line of clothing within a budget.They have created a space for women all of sizes to express themselves with beautiful prints, colors and silhouettes. Designer Vibhooti Wadhwani believes that "you are your own standard of beauty", so Blush caters to a range of sizes and you can even get your favorite pieces custom made. All you need to do is send them the design you like and your measurements.
http://www.blush.shop/

 3. Brand For Less/Tchibo 
A three in one online store! Brand For Less, Tchibo and Toys for Less. There is something for everyone. Brands For Less now has a presence across the Middle East. They own thirty outlets in countries such as UAE, Bahrain, Lebanon, Kuwait, Saudi Arabia, Yemen and Qatar. They bring shoppers the best international brands at a fraction of the original price. Use filters to narrow your searches. For example, search by size and you might have some good finds in plus size. \
Also, Tchibo has some cute pieces and wardrobe basics that go up to size 50-52 FR (20-22UK)
https://www.brandsforless.ae/

 4. DressLink 
DressLink is also another fashion online store that I came across just recently. Mainly for standard sizes, they have one section of plus size dresses, ranging from day dresses, cocktail dresses to evening wear. You might find some good bargains!
https://www.dresslink.com/Event-plus_size_dress-index.html

 5. Elabelz 
Elabelz is an online fashion store for the entire family and luckily they have a plus size section too!
It features a couple of plus size brands and the one that stands out the most is Forever21+ so you might benefit from sales on old and current collections. Two of my last orders from Elabelz were dedicated to F21+ and I got a special discount on a pair of polka dots pants and a slogan sweater. I was a happy shopper!
https://www.elabelz.com/en_ae/women-clothing-plus-size-clothing/

 6. GAP 
Yes you read me right! I am size 20-22 UK and I have noticed that there are some pieces from GAP in sizes XL and XXL that work for me. Some of these items have stretch in them so why not try out their basics, whether it is summer dresses, GAP tees or just flared skirts with elastic waist-bands.
They launched their online website for the UAE at the end of last year. I usually enjoy shopping from GAP for my son, but I sometimes a few bits for me to the shopping cart.
https://www.gap.ae/

 7. H&M 
We all know the highstreet giant H&M and just a couple of days ago, they launched their online store for the Middle East and GCC. The plus size section - like in-stores - is quite small but there are some inevitable basics that can be key pieces in your wardrobe. They just launched so keep a close eye for any updates.
https://ae.hm.com/en/ladies/shop-product/hm-plus-sizes

 8. Jollychic.com 
So far, this shopping guide is quite diverse: it is for all budgets and for all tastes. I decided to add Jollychic, as it easily falls in the same category as the likes of Shein, Rosegal, Zaful, etc...
https://www.jollychic.com/

 9. MANGO (Violeta) 
Violeta is the plus size range for the high-street giant MANGO. I am a big fan of Violeta by MANGO, especially their tops and t-shirts. I haven't tried their jeans and bottoms yet but I am tempted to do so soon. I am always very pleased whenever I place an order with them. It takes up to a week to receive your order and their customer service is always so on point. Defintely a must-try!
https://shop.mango.com/ae-en/plus-size

 10. Max Fashion 
Max Fashion is one of the largest value fashion retailers in the Middle East. I have known Max for at least 15 years. When I turned 19, like any young woman, you are still discovering your style and personality. Being a big girl did not make the task easy and I remember Max was one of the first brands I would go to, mainly for daily casual wear. It was affordable and it would complement my size 18 UK back then. Although their plus size range always suffered in terms of style, two years ago the company was set on a mission to revamp the plus size collection and at some point I was impressed, considering that it was affordable fashion. I hope they keep catering to plus size women, and including more trendy and key pieces into each season's collection.
https://www.maxfashion.com/ae/en/c/women-plussize

 11. Namshi 
Namshi is fashion at your finger tips and plus size is included! They are a two-time award winning company, delivering your regular dose of style, with hundreds of new products to check out every single week! As for plus size, they feature brands like New Look Curve, Forever21+, Missguided+, Quiz, Simply Be, Dorothy Perkins Curve, NIKE, Ginger Plus and Evans.
From sizes 18-30 you'll find everything from active wear to everyday essentials.
https://en-ae.namshi.com/women-clothing-plus_size_clothing/

 12. NEXT 
UK Brand NEXT has catered to the region's online fashion shoppers! And to make things even more exciting, not only is there an array of brands like F&F, Boohoo and YOURS under the umbrella of next.ae, but there are also items in plus sizes!
https://www.next.ae/en

 13. Off Size 
Off-Size offers a hassle-free plus size online shopping experience for women who are looking for plus size clothes. To be completely honest with you, I came across this online store only a few weeks ago and what caught my attention was the fact that they had a wide collection of items from amazing brands like Carmakoma and Kiyonna. You should totally check it out!
https://www.off-size.ae/

 14. Rosegal (Arabic) 
RoseGal was actually started by a group of friends who all shared a strong passion for stunning clothing and fashion. They have also recognized the need to cater to plus size women, a demographic that has long been ignored. They showcases diversity in styles from modern to vintage.
https://ar.rosegal.com/plus-size-43/

 15. SheIn (Arabic) 
SheIn is also a giant retailer offering affordable ladies fashion dress online store for every occasion. You can always find good bargains and what I noticed is when you switch your SheIn to Arabic it activates the COD option, which for me is a total win. SheIn has been promoting their plus size range and I have actually just placed my first order ten days ago. Excited to see the outcome!
https://ar.shein.com/Plus%20Size-c-1888.html

 16. SIVVI 
Online shopping has changed forever! Launched in the Middle East in Spring 2014, SIVVI.COM showcases fresh international high street labels, top-notch sportswear and boutique brands. They too have a plus size section, featuring pieces from Yours London and Lost Ink Plus.
https://en-ae.sivvi.com/womens/clothing/plus-size-clothing

 17. Amazon.ae 
What we all knew as Souq.com has now become Amazon.ae! The change happened just recently and the platform is of course very familiar to all of us.
https://www.amazon.ae/

 18. Splash+ 
More on affordable fashion, Splash is also one of the most prominent fashion retailers in the region and it doesn't as a surprise if it is featured in this list. A few months, Splash+ launched a campaign that promoted diversity and #therightsize, all in the effort to attract a younger clientele and to inject more style into their collection. Whether in-store or online, you should definitely check it out.
Although it might not be everyone's cup of tea but I say it is worth looking into...
https://www.splashfashions.com/ae/en/c/women-plussize

 19. VogaCloset 
VogaCloset is a U.K.-based online fashion store offering the latest women, men and kids trends from the runways directly to the closets of fashion enthusiasts in the Middle East. For their plus size section, they have happily included Booho Plus and Pretty Little Things so make sure you go take a look. There are also offers and discount codes on a regular basis so make sure you subscribe.
https://vogacloset.com/women-plus-size

 20. VS Fashions 
VS Fashions is an online fashion store based in the UAE and caters to standard and plus size
Although their plus size range stops at a size 20 UK, VS Fashions is mostly suitable for women who are between standard and plus size. Getting the best of both worlds!
https://www.vsfashionsstore.com/collections/curve

 21. Zaful (Arabic) 
ZAFUL is your one-stop online shop for the latest trends: daring, exciting and edgy fashion apparel. They feature affordable collections that are all about redefining trends, design excellence and good quality.The original idea is to share the latest news and fashion trends on women's clothing with fashion-forward, free-thinking girls, and they offer the fast fashion worldwide.
https://ar.zaful.com/plus-size-e_96/

 22. 11 HONORE 
11 Honoré is a size-inclusive shopping site that for the first time ever, gives more women the option to experience the best designer clothing and celebrate and honor their bodies, beauty and style.
Designer fashion a click away!
https://11honore.com/