Marilyn's clothes size is kind of unknown.
www.snopes.com has a great article on it; basically, sizes are different now than then and her clothes were custom-made or tailored to her figure.
I wish I had:
-Wedge platform shoes in a neutral color (essentially pinks or reds or something like that). I don't care what style really.
-Long, cardigan coats that aren't going to break the bank. I don't care how unfashionable they are, they're warm.
-Cute shoes that fit. I wear between a 3.5 little girls to 5, and it's difficult to find cute shoes in a size that fits
-Good, inexpensive cotton tank tops without those shelf-bras. Shelf bras do not provide support for my breasts, wearing a bra underneath either presses my breasts strangely or reveal bra, and cutting those things out can be next to impossible