I'm almost always Dorothy for Halloween, with my homemade Ruby Slippers and the dress a friend of my mom's made for me in when I was in high school. Even though I am not, by any stretch of the imagination, the same size I was when I was 17, year after year, I find I can still zip up that dress. Sunday, I had trouble with the zipper and thought, damn. I have finally gained so much weight that I can't be Dorothy. Then last night, I tried the dress on with a different bra and it zipped . I didn't even have to click my heels three times. That dress is not my only piece of clothing that's magic:I have a pair of vintage track pants that I've worn for the last 10 years, and I've been anywhere from a size 8 to a size 16 during that time. These pants always fit, no matter what; the best part is that they were purchased for $5 at a street fair. While it's true that track pants and sweat pants and all kinds of stretchy, comfortable clothes can be dangerous, if you wear them all the time — it's hard to gauge if you're gaining weight when you do — there's definitely an upside to "magical" clothes. I like to think of these pieces as friends, who embrace you no matter what size you are. Of course, the truth is that there isn't really any "magic" in magical clothes. There are just dresses with A-line shapes; straight-cut, elastic-waist pants, forgiving fabrics and deceptively roomy Halloween costumes stitched with love. But it's fun to imagine that a garment that's always there for you is infused with mystical, supernatural powers. It just sounds so much better than "stretch."