I have been wearing Levi 501 shrink-to-fit for at least 20 years.  My advice re. buying online is don't.  Here's why.

I hate to shop and normally just ask my wife to pick up some jeans when she's at the store.  I know my size, and this has always worked.  So, when internet shopping came into vogue, things were even easier.  Until a couple of years ago.  Starting then, my good old size started showing up too big, or too small, or wouldn't shrink right.  Bottom line is that I wound up with several unusable pairs of jeans.  So, I finally bit the bullet and made the trek to Macy's.  Tried on 4-5 pairs of identically marked jeans and they were all over the map.  Found a pair that fit.  Washed them once and they turned into floods.  Returned them and got another pair.  Washed them and they're ok.  So, I'm done with buying jeans online.  And I'm probably done with Levi's.

I say "probably" because this assumes I can find anything any better.  The market provides what the consumer demands, and apparently what the American consumer demands is cheap, useless junk.  As other reviewers have observed, the current version of Levi's denim is shameful.  Not only is it thin and non-wearing,  but since it shrinks along one bias more than the other, it is important to orient the fabric in the machine correctly.  Apparently, this is too much to ask.  Ditto for getting either the waist or the leg to match the label.

Bottom line:  My advice is, if you're going to buy Levi's, don't do it online.  It just doesn't work.