Here's my crochet pattern for the blackberry jam jar bonnets.
Be creative with what you use for the tie.
You can use yarn, leather, ribbon, lace, rick rack etc.

Recipe:
This pattern is for half pint jar lids
C or 2 hook 2 3/4mm
I used rug string
Work in the round
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Ch5, join with sl st in 1st ch to form ring.
Row 1: Ch 4 *dc ch 1* repeat from *to* 7 times in ring. Join with sl st in 3rd ch of ch 4.
Row 2: In first chain space: sl st, ch3, 2 dc, ch 1.
In remaining chain spaces 3 dc ch 1. Join with st st in top of ch 3.
Rows 3-6: 3 dc in each st around, join each round with sl st in top of ch 3.

Row 7 Edging: *Ch 3, sc in next st* Repeat from *to* in all remaining stitches. Sl st in first st to join. Fasten off.
Weave in ends.
Cut your tie and weave thru the spaces in the row above the edging.
Tie a bow.
Give your Jam to someone special!