Bought new jean---a size smaller :-)

I bought some jeans a size smaller. My old ones wouldn't stay up. Dang! What a bad problem to have. New jeans are a size 10. I was size 16 at my biggest---so not too bad! Still haven't lost much pound-wise! Still below the 5# mark, next goal will be to get below the 10# mark (i.e. get below 170#, 160#, 150#, 140# I won't divulge my weight).
When I got married---I know that was a long time ago---for those of you who knew me then, think back to what I looked like. I thought I looked "OK" body-wise and was a size 8. Previously (in high school) was a 6, and looked nice. So, I have one more size to go to get to my wedding size, yet only 2 pounds to go to get to my pre-pregnancy weight---not making any sense at all.
I guarantee that I now have more fat on my body than I did when I got married (I was a teenager when I got married). So, here are my questions:
1) are they making clothes bigger now than 15 years ago? (i.e. a 10 now is bigger than a 10 then)
2) if I continue on my current loss in body size and then finally manage to lose pounds, what will I look like? Is it possible to end up smaller than an 8?

In junior high, I was a size 3 and weighed 110 pounds, and then my figure filled out a little more, mostly hips... (to this day I still remember my mom freaking out that I had stretch marks on my hips lol)
In high school I was a size 6 and weighed 115 pounds
When I got married (age 19), I was a size 8 and weighed 125 pounds (freshman 10 lol)
When I got pregnant (age 28), I was a size 12 and weighed 150 pounds
After 2 pregnancies (age 34--now), I am a size 10 and still above my pre-pregnancy weight.....I KNOW my gut is bigger now....

This will be really interesting to see how this turns out....