Tutorial video step-by-step how to #crochet triangle, perfect decoration for bunting flag banner, birthday, Christmas, valentine, or other celebration. I am using worsted-weight yarn and crochet hook size 4 mm. Feel free to use other kind of yarn, and matching crochet hook.

Watch step-by-step video tutorial of Triangle Crochet in Any Size | Bunting Flag Banners

Written Pattern of Crochet Triangle or Bunting Flag Banners

MATERIALS
Any yarn type/weight, any crochet hook size. In my video, I used worsted-weight yarn and 4mm crochet hook.

ABBREVIATIONS (US Crochet Terms)

MR: Magic Ring
st(s): stitch(es)
sl st: slip stitch
ch: chain
sc: single crochet
cross stitch sc: instead of yarn over, get a loop by hook from the top
inc: increase (make 2 sc in the same space)
[#]: number of stitche(s) in a round

PATTERN

Row 1: Ch 2. Sc in the 2nd loop from hook [total 1 sts]
Row 2: Ch 1, turn. 3sc in the same space [3 sts]
Row 3: Ch 1, turn. Sc in each st [3 sts]
Row 4: Ch 1, turn. Inc, sc, inc [5 sts]
Row 5: Ch 1, turn. Sc in each st [5 sts]
Row 6: Ch 1, turn. Inc, sc in next 3 sts, inc [7 sts]
Row 7: Ch 1, turn. Sc in each st [7 sts]
Row 8: Ch 1, turn. Inc, sc in next 5 sts, inc [9 sts]
Row 9: Ch 1, turn. Sc in each st [9 sts]

Continue these pattern until you are happy with the size of your triangle.
Then fasten off and cut the yarn.