Here are two tricks for men to see if jeans or pants will fit you without trying them on.
These are great if you’re at a thrift shop, flea market, or another store that doesn’t have a fitting room and you want to see if jeans might fit or not.
You can find your waist size by putting the waist of the jeans around your neck. They should be able to touch behind your head without there being a bunch of extra fabric.
You can find the right length by holding the bottom of the legs and stetching the legs straight out. The bottom of the jeans should hit around your thumb joints.
Now obviously everybody is shaped a bit differently, so while this might not be perfect for everyone, it should give you a good idea as to whether the jeans might be a good fit or not.