The alleged thief sat close to the victim, a 39-year-old woman, inside the Century 21 at 61-35 Junction Boulevard in Rego Park, about 11:30 a.m. Jan. 20, police said.
Then, according to cops, the thief reached into the victim's pocketbook and took out her wallet.
The incident was captured on the store's security camera, according to a video released by the NYPD.
Police described the suspect as a 40-to-50-year-old woman, 5-foot-4, heavyset, with long black hair. She was last seen wearing a black coat and black pants.
Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS (8477). The public can also submit tips by logging onto the Crime Stoppers website at WWW.NYPDCRIMESTOPPERS.COM or by texting their tips to 274637 (CRIMES) then entering TIP577. All calls are strictly confidential.