A little thought on sewing patterns...

I had a little thought today at work about the sewing patterns I had scored last year at the thrift store. This last dress I made was a size 4T - but it still fit pretty well on Esme (who is 2 years old but in size 2-3T clothes when storebought). What does that mean? I can break out the other size 4 patterns I have set aside and try them out! I know it sounds silly but that really makes me happy. It's like unlocking a treasure chest I already have on a shelf :)