To ask if a size 18 should wear these dresses?

[confusedfrump]

I’ve been gifted an M&S gift card and picked up these dresses. I’m a size 18, 162cm. I am having second thoughts about wearing them now though because I feel like they’re too short and would show too much of my legs

I'm size 18, 5"9, and have very muscled legs and would wear them.

This - whatever your size, your legs may be great!

It’s perfectly possible to have great legs at size 18. These dresses are great for hiding the upper body and showing off legs so if that’s your aim then they will be great for you.

You can wear whatever you like but it won’t look anything like it does in the photos.