The feature will be added in the coming months and Google VP of product Jonathan Alferness explained how it will work on CNBC.
"'OK Google, where can I find a brown pair of men's Top-Siders, size 11, nearby?' The Assistant will answer with how many stores have the item and how far away they are," he said.
The feature is powered by local inventory feeds that retailers that buy ads on Google send. Participating retailers include PetSmart, Saks Fifth Ave., Bed Bath & Beyond, (BBBY) - Get ReportHome Depot, (HD) - Get Report and Sephora.