Four Lladro figurines were stolen from a home in Brighouse yesterday.
The break-in happened between 10.40am and 1.40pm in Laverock Lane.
Detectives believe the suspect carried the items away in two pillowcases - one bright pink and the other lilac gingham.
They are appealing for anyone who witnessed the burglary or anyone who noticed someone acting suspiciously in the area to get in touch.
Anyone with any information is asked to contact PC Laura Thomas in Calderdale CID on 01422 337086.