House Mouse can grow to about 7cm-10cm in size.
A House Mouse is usually grey or dark grey in color.
They are 1 of the fittest amongst the rats/mice family. They are known to be excellent swimmers. You can always spot them in the big sewers (longkang in Singapore). Many of these house mouse like to hang around the big dustbins located outside landed properties (because there are alot of food options there) or at the alleyway behind the rows of restaurant shophouses.