polka dot

pilkkukuviointi Any of a number of uniform round dots, repeated to make a regular geometric pattern on a fabric
1871, w:Godeys Lady's Book|Godey’s magazine,'' http://books.google.com/books?id=IpRMAAAAMAAJ&q=%22polka+dot%22&dq=%22polka+dot%22&lr=&as_drrb_is=b&as_minm_is=0&as_miny_is=1800&as_maxm_is=0&as_maxy_is=1880&as_brr=0&ei=BbPOS_6OH4SukASEzvCtAQ&cd=2 Volumes 86–87, page 389:

…these have entirely disappeared, and we see them with the old time white polka dot, always pretty clean and neat looking.