Materials Needed:

Worsted weight yarn in orange (or your preferred pumpkin color)
Small amount of yarn in green for the stem
Crochet hook suitable for your yarn (size G/4.00mm works well with worsted weight yarn)
Yarn needle
Scissors
Keychain ring or lobster clasp
Abbreviations:

ch: chain
st: stitch
sc: single crochet
hdc: half double crochet
sl st: slip stitch
Pattern:

Pumpkin:
Start with orange yarn.

Magic ring, 6 sc into the ring. (6 stitches)
Inc in each st around. (12 stitches)
Sc, inc around. (18 stitches)
Sc 2, inc around. (24 stitches)
Sc 3, inc around. (30 stitches)
Sc 4, inc around. (36 stitches)
Sc 5, inc around. (42 stitches)
Sc 6, inc around. (48 stitches)
Sc in each st around. (48 stitches)
Sc 6, dec around. (42 stitches)
Sc 5, dec around. (36 stitches)
Sc 4, dec around. (30 stitches)
Sc 3, dec around. (24 stitches)
Sc 2, dec around. (18 stitches)
Stuff the pumpkin lightly with fiberfill or stuffing.
Sc, dec around. (12 stitches)
Fasten off and leave a long tail for sewing.
Stem:
Using green yarn.

Ch 6.
Starting from the second ch from the hook, sc in each ch across. (5 stitches)
Ch 1, turn. Sc in each st across. (5 stitches)
Ch 1, turn. Sc, hdc, dc, hdc, sc across. (5 stitches)
Fasten off and leave a long tail for sewing.

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