Easy to wear, cotton summer dress

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I've had a look online but I've drawn a blank so far so I thought I'd come to S&B for help.

I'm desperately in need of just one nice summery outfit. I feel ugh about my clothes at the moment. Most of them are years old. I would like just one dress that feels nice to wear. My criteria are:

Nice but not too dressy
Ideally 95–100% cotton (or viscose would be ok)
Roughly knee length (I'm 5ft4)
Not too low cut (32FF boobs that I do not want to show off)
Sleeveless or short sleeves
Size 10–12 (nearer 12 than 10)
Not too clingy on my flabby bum/thighs
I fancy something with a pattern or at least more than just one block of colour

Answers on a postcard...

Am I being too picky?

No
But I do think you’re being a tad optimistic.
Summer almost over!

This is viscose
www.peacocks.co.uk/lds-drs-bardot-horn-button-5260a9.html

I'm thinking about getting my tights out .

What's your budget?

Slightly ££ but I've just bought this and it's lovely! https://www.cosstores.com/en_gbp/women/womenswear/dresses/product.contrast-panelled-jersey-dress-blue.0644537001.html

www.next.co.uk/g67148s6#155336
linen/viscose mix, lots of colours including some patterns. They had a lot more choice in store last time I looked, but that was a few weeks ago now. I'm still wearing mine, but with a cardi

Just got this in matalan £16 looks really nice with a belt and would go through to autum/winter too. (Can't do links)

I was going to suggest the Next dress fox posted. I have two in different colour and they are so easy to wear. Yes to wearing them with a cardi too.

Summer almost over

Ah yes, but I'll wear it for years! And I have a holiday in September.

Thanks for the suggestions. The Next dress might be a contender.

I would look dreadful in the Cos dress. I need more shape in the dress to make up for my lack thereof.

The Matalan dress isn't summery enough to fulfill my want of a dress for hot sunny weather (which I believe there will be more of )

The Peacocks dress is a no go as I need to wear a bra. Post breastfeeding saggy boobs

Oasis have some dresses at the moment. I saw lovely orange shirt dress in there today. I can’t see it listed on the website but it looked good on the hanger.

Wow! I’ve just started buying coats and boots. You’re obviously not in Edinburgh!

Sounds like a Seasalt dress to me. Have you looked there?

Matalan again?

TK maxx has some nice cotton ones last week. Cross over front with elastic at the back to make it more fitted. £18
Maybe I got lucky but I saw a few

I mentioned Oasis upthread but I meant Mango, duh! This would look nice with strappy sandals.

FLORADAY summer dresses are nice

How about this from Collectif: www.collectif.co.uk/clothes-c1/maria-charming-bird-swing-dress-p7787.

I have this and get compliments from strangers every time I wear it!