Blackbird has conjured up the ultimate mending kit containing anything a simple, basic repair may entail. Need a button put back on a shirt? Need to hem a pair of trousers? Outgrew something and are listing it on the web and need to take measurements? All of this and more is covered in this must have for the do-it-yourself maverick or those with a tendency toward a somewhat tattered wardrobe.

And here's a link to a feature about it on Selectism.
Blackbird - Mending Kit
DETAILS: Includes six ball tipped straight pins for holding fabric together, four small safety pins for emergencies, four size 7 sharp needles for hand sewing buttons and small repairs, one large spool of polyester black thread, one large spool of polyester white thread, and two collar stays. A measuring tape, a chalk square to mark fabric for buttons and seam lines, etc., a seam ripper, small pair of scissors, and small aluminum thread guide. A card containing four buttons with instructions on how to sew on a button all housed in a one quart canning jar.