No idea. Maybe Get a flannelette shirt and a pair of overalls for the body. Some boots, a hessian sack and a hat. You could get gloves as well - glves and boots to help the straw not to come out
Draw a face on the sack (this ma be better to do after stuffing) put the hat on either glue or sew it.

I'm not sure if anything other than straw goes in the clothes, how it stays together?