Around £2,000 worth of make-up was stolen from a display at Boots, in Warminster, at 1pm last Wednesday.
It follows two similar incidents in Boots and Superdrug stores in Melksham this month.
CCTV images showed two women entering the Boots in High Street last Tuesday, with one placing cosmetics into a large leather tote bag.
She was slim, 5ft 8ins, with black hair, a bobble hat, black coat, grey top and a lot of make-up. She was with a blonde woman in a khaki jacket, black leggings and brown boots.