Do not wash raw denim in the washer machine, the color will fade into the ugliest, brightest blue and you'll be sad. When buying raw denim, you should try to buy your exact size or a half size smaller because they stretch out to better fit your body. I know this doesn't help your current situation but my advice would be to gift this pair to someone else and buy yourself a new pair. If you're able to, go try on some pairs at a store to get an idea of weight/size/lengths before buying online. Good luck!