In a fairly slim country as a whole, what do Polish men think of women like this?
Depends on the guy mostly. Polish women tend to be skinny than get fat as they age, get married, have kids, etc. Of course not all though. Nonetheless, there's a lot more overweight people in Poland than there use to be. You can thank globalization for causing laziness. You use to never see a fat person in Poland because everyone ate healthy, exercised, walked a lot, etc. Now it's a common sight.