Does anyone have this Tesco dress?

[Psychicpineapple]

If so what is the fit like? Do you find it small?
I saw it in the sale but only a 16 left, I'm an 18 but thought it was worth a try. It was a tiny bit tight on the bust but probably wearable.
I returned it and it was sold out in an 18.
I was delighted to see it in an 18 on Vinted the other day but if anything when I tried it on it seems smaller than the 16. Not wearable.
I'm wondering if there is any point keeping an eye out for a 20 or is the sizing completely off.

Sorry to not be able to be specific but I had the same issue with another F&f dress.

i’m a busty 16, and really liked a cotton cheesecloth tiered dress in green which fitted me perfectly in a 16, so went back to get it in black too. Ideal every day summer dress.
didn’t have a 16, so got an 18. Too tight. Got a 20, snug!! So I now have a green in a 16, and a black in a 22…!!!! Comparable fit.
makes no sense. Same dress! Their sizing is way off, or labelling, or both!

Thanks @Mykittensmittens . It just goes to show there's no point getting hung up on sizes because there isn't even consistency within a brand.
It's a pity because I really like the dress. I might see if a dressmaker could do anything with it.