Golden Syrian hamster with white belly, missing

I lost my golden Syrian hamster yesterday around 3pm. He’s a tiny fluffball, about 2 inches long, with golden-brown fur and a white belly, plus a faint white stripe along his right shoulder. He also has a small nick on his left ear and a pink nose that shows when he peeks out of his hiding spot. I think he squeezed out during me cleaning near Main Street and 2nd Ave SE in downtown Aberdeen, Northeast SD. He’s been part of the family for years, and I’m really worried and hoping to get him back safe.