The classic Gill Sans typeface is used for the lettering, and the wheat graphic is influenced by the illustrations which appeared on historic wheat bags.
Jigsaw Bakery Stationary Suz GuthrieJigsaw Bakery Stationary Suz Guthrie
The logo was made into a stamp representing the artisan nature of the business, as well as allowing all the family to get involved in stamping packaging!

Photos of Jigsaw Bakery: David Donnan, Igentics.