You can easily alter this pattern to fit any size jar
. 
I used:
9cm x 7cm jam jar
2ply yarn
Size 2.5mm hook
Glass wine (optional)
For the photos, I used a chunky yarn so you can see the stitches
I have also used American crochet terms
Here, single crochet (sc) = UK double crochet
dc = UK treble crochet
1: ch 7
2: join with slip stitch to make ring
Making the Solomon's Knot
3: draw out the loop on your hook to the desired length. To fit my jar, I used a thumb-nail's width, but you could make it longer if needed
4: yarn over
5: draw through, keeping all threads the same length
6: hook through the back thread
7: yarn over
8: pull through (2 loops on hook)
9: yarn over again
10: draw through both loops
Ta daaaaaaaaaaa! One Solomon's knot completed.
Repeat steps 3-10. You now have 2 sks, which is the basis for the pattern
11: make a single crochet into the ring
You should now have one 'petal' completed.
12: draw up the loop on your hook again. Repeat steps 3-11 until you have 6 petals around your ring
13: Make one more Solomon's knot (sk). Make a sc into the end of the 1st sk. Round 1 complete
Round 2 and beyond ..
14: make 2 sk, 1sc into the end of next sk (the top of the petal) Repeat 5 more times to complete the round
15: continue making rounds until your crochet reaches the neck of the jar. For my jar, this was 8 more
Now to join the Solomon's knots around the top. This took me a few goes to get right for my jar
16: ch6, 1sc in the top of next sk. Repeat around to join all sks. Ch 4. Turn, ch1
17: sc 46. Turn ch3
18: dc 46. Turn ch 3
19: dc 46
20: make edging if you like.I used a picot stitch. Finsh off. Leave long end for joining
Now fit crochet onto jar and stitch together the join around the neck of the jar. Finish off, weave in ends
21: admire your lovely work. Add tea light and bask in its calm glow
Well I hope that works for you.
Enjoy, and do let me know how you get on.
Xx
