Happy Holiday Season, and happy shopping! The "in time for Christmas" question... I can't be certain for you, although if you are in BC or Alberta you chances are good until about the 15th. For everyone else, if you want it for Christmas please choose a tracked shipping option.
This is a useful guide for sashiko stitching, but do take a look at the 'How To Sashiko Stitch' page, and for more detailed information and tips for sashiko explore our sashiko blog entries.