This is part of the Sylvanian Families Japanese clothing range, designed to fit a regular size brother figure. This particular fashion set for a boy was released around 2006. It is now very hard to find this particular costume.
Figures in images are only from stock images used to advertise this product. Figure not included.
This set includes 1 x boy's costume and mittens and a cap
This comes in Japanese Sylvanian Families packaging.