This vintage black with white polkadot half slip with a 12" back slit from Marks & Spencer's St Michael label is made of polyamide with lace trim at the hem. The marked size is UK 12-14 / EU 40-42, but to ensure a good fit please refer to the measurements below, taken with the garment laid flat and doubled where appropriate:

Waist (lightly stretched): 28" / 71.1 cm
Hips: 39" / 99 cm
Length from waist to hem: 27" / 68.6 cm
Sweep (circumference): 46" / 116.8 cm

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