Imma guess big. Vintage 3 piece suit by Sulka, NWT, pure vicuña.I picked up a pair of pure cashmere trousers by Incotex last year. Softest thing I have ever touched - didn't hold a crease worth a damn, but flipped quite well.
Honestly, the IRS wants you to report every bit of income. Heck, they want you to self-report use tax that you owe for online purchases where sales tax wasn't withheld (well, that's more for state taxes, but still true).