Absolutely fabulous Vintage Bellman's Midi Dress.
There is no label showing the sizing but the measurements are as follows
Taken whilst laying flat (double for circumference)
Waist 38cm
Pit to Pit 45 cm
Length from shoulder to the bottom hem 90cm
Please contact us with any further measurements you need
Likely to fit a UK 8-10  Zip up the back and round neck line.
Long sleeved

We do not have exact year or even decade of this item but believed to be pre 1970s. 

This item is used and vintage but in a good condition with some minor fading and general wear but overall good.

Polyester