This set of Chalk Board Stickers from Nicola Spring offers a charming and convenient method of organising your homemade jams, preserves, pasta and other foods.Available in two sizes, these labels can easily be doodled on or decorated with any standard liquid chalk pen (sold separately). The special material allows you to wipe clean and reuse again and again - no need to consign your jars to the recycling bin once they're empty!.