This pattern involves some shaping. I’ve included a link to a photo tutorial for the shaping technique used.

Abbreviations: ch = chain, chs = chains, ea = each, dc = double crochet, sc = single crochet, sc dec = single crochet decrease, sp = space, st = stitch, sts = stitches

Materials: about 1 1/2 oz. any worsted weight yarn (acrylic can be used but consider cotton if for summer use), US size H hook, about a 1 inch small square of velcro (2 pieces) for closure

Size (it’s ok if yours varies): 7” long (not counting straps), 6 3/4” wide, strap = 5 1/2” long.

Shaping Technique:
sc dec over next 2 sts - Instructions link, with photos: sc decrease how-to

Pattern Note: You will turn at the end of each row.
Main Piece: (started at top of bib. Shells will be upside down on the finished piece).
Starting Chain: ch 28.
Row 1: working in one loop of each starting chain, sc in second ch from hook, sc in ea ch across. (making 27 sc in the row)
Row 2: ch 1 (to turn), sc in the first sc, sc in next sc, * skip next 2 sc, 5 dc all in next sc, skip next 2 sc, sc in next sc , repeat the directions between * and 3 more times, then sc in last sc.
Row 3: ch 3 (counts as first dc), 3 dc all in next sc, * skip next 2 dc, sc in next dc, skip next 2 dc, 5 dc all in next sc , repeat the directions between * and 2 more times, then skip next 2 dc, sc in next dc, skip next 2 dc, 3 dc in next sc, dc in last sc.
Row 4: ch 1 (to turn), sc in the first dc, sc in next dc, * skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in next dc , repeat the directions between * and 3 more times, then sc in ch-3 at the end of the row.
Rows 5 and 6: Repeat Rows 3 and 4.
Rows 7 and 8: Repeat Rows 3 and 4.
Longer Bib Option: If you want the bib to be longer, repeat rows 3 and 4 additional times, then proceed with the row 9 directions and the shaping rows (these final rows add about 3 inches to the length).
Row 9: Repeat Row 3.
Shaping Rows begin -
Row 10: ch 1 (to turn), sc dec over first 2 dc, * skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in next dc , repeat the directions between * and 2 more times, then skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc dec over last 2 dc.
Row 11: ch 3 (counts as first dc), 2 dc all in first sc (same place as ch-3 just made), * skip next 2 dc, sc in next dc, skip next 2 dc, 5 dc all in next sc , repeat the directions between * and 2 more times, then skip next 2 dc, sc in next dc, skip next 2 dc, 3 dc in last sc.
Row 12: ch 1 (to turn), sc dec over first 2 dc, skip next dc, * 5 dc all in next sc, skip next 2 dc, sc in next dc, skip next 2 dc , repeat the directions between * and 2 more times, then 5 dc all in next sc, skip next dc, sc dec over last 2 dc.
Row 13: ch 1 (to turn), sc dec over first 2 sts, sc in ea of next 2 dc, skip next 2 dc, * 5 dc all in next sc, skip next 2 dc, sc in next dc, skip next 2 dc , repeat the directions between * and 1 more time, then 5 dc all in next sc, skip next 2 dc, sc in ea of next 2 dc, sc dec over last 2 sc.
Row 14: ch 1 (to turn), sc dec over first 2 sc, sc in next sc, sc in ea of next 3 dc, skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in next dc, skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in ea of next 3 dc, sc in next sc, sc dec over last 2 sc.
Row 15: ch 1 (to turn), sc dec over first 2 sc, sc in ea of next 3 sc, sc in ea of next 3 dc, skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in ea of next 3 dc, sc in ea of next 3 sc, sc dec over last 2 sc.
End off, leaving a strand for weaving in. Weave in the ends, to secure.

Bib Strap Right-hand Side: Turn the Main Piece so that the starting chain edge is facing up, ready to be worked in next. You will work in the remaining loops of the starting chain.
Attach the yarn in the first starting chain remaining loop on the right-hand side of the piece.
Row 1: ch 1, sc in first ch, sc in ea of next 7 chs. You will now turn and leave the rest of the row unworked for now.
Row 2: ch 1 (to turn), sc in first sc, sc in ea of next 7 sc. (8 sc in row)
Row 3: ch 1 (to turn), 2 sc in first sc, sc in ea of next 5 sc, sc dec over last 2 sc. (8 sc in row)
Rows 4 - 11: ch 1 (to turn), sc in first sc, sc in ea of next 7 sc.
Row 12: ch 1 (to turn), 2 sc in first sc, sc in ea of next 5 sc, sc dec over last 2 sc.
Row 13: ch 1 (to turn), sc in first sc, sc in ea of next 7 sc.
Row 14: Repeat Row 12.
Row 15: Repeat Row 13.
Row 16: Repeat Row 12.
Row 17: ch 1 (to turn), sc dec over first 2 sc, sc in ea of next 6 sc.
Row 18: ch 1 (to turn), sc in first sc, sc in ea of next 4 sc, sc dec over last 2 sc.
Row 19: ch 1 (to turn), sc dec over first 2 sc, sc in ea of next 4 sc.
Row 20: ch 1 (to turn), sc in ea of next 3 sc, sc dec over last 2 sc.
Row 21: ch 1 (to turn), sc dec over first 2 sc, sc in ea of last 2 sc.
End off. Weave in ends.

Second Bib Strap: Turn the Main Piece so that the unworked side of the top row is on the right-hand side. Attach yarn in the first starting chain remaining loop on this side of the piece.
Second Bib Strap Rows 1 - 21: Repeat Rows 1 - 21 of the Bib Strap Right-hand Side instructions.

Sew one piece of the velcro to the right side of one strap, near the top of the strap and the other piece of velcro to the wrong side of the other strap, positioned so that it will line up with the velcro on the other strap.

Photo © Sandi Marshall. Licensed to About.com, Inc Designed by and Directions Written by Sandi Marshall
This pattern involves some shaping. I’ve included a link to a photo tutorial for the shaping technique used.

Abbreviations: ch = chain, chs = chains, ea = each, dc = double crochet, sc = single crochet, sc dec = single crochet decrease, sp = space, st = stitch, sts = stitches

Materials: about 1 1/2 oz. any worsted weight yarn (acrylic can be used but consider cotton if for summer use), US size H hook, about a 1 inch small square of velcro (2 pieces) for closure

Size (it’s ok if yours varies): 7” long (not counting straps), 6 3/4” wide, strap = 5 1/2” long.

Shaping Technique:
sc dec over next 2 sts - Instructions link, with photos: sc decrease how-to

Pattern Note: You will turn at the end of each row.
Main Piece: (started at top of bib. Shells will be upside down on the finished piece).
Starting Chain: ch 28.
Row 1: working in one loop of each starting chain, sc in second ch from hook, sc in ea ch across. (making 27 sc in the row)
Row 2: ch 1 (to turn), sc in the first sc, sc in next sc, * skip next 2 sc, 5 dc all in next sc, skip next 2 sc, sc in next sc , repeat the directions between * and 3 more times, then sc in last sc.
Row 3: ch 3 (counts as first dc), 3 dc all in next sc, * skip next 2 dc, sc in next dc, skip next 2 dc, 5 dc all in next sc , repeat the directions between * and 2 more times, then skip next 2 dc, sc in next dc, skip next 2 dc, 3 dc in next sc, dc in last sc.
Row 4: ch 1 (to turn), sc in the first dc, sc in next dc, * skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in next dc , repeat the directions between * and 3 more times, then sc in ch-3 at the end of the row.
Rows 5 and 6: Repeat Rows 3 and 4.
Rows 7 and 8: Repeat Rows 3 and 4.
Longer Bib Option: If you want the bib to be longer, repeat rows 3 and 4 additional times, then proceed with the row 9 directions and the shaping rows (these final rows add about 3 inches to the length).
Row 9: Repeat Row 3.
Shaping Rows begin -
Row 10: ch 1 (to turn), sc dec over first 2 dc, * skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in next dc , repeat the directions between * and 2 more times, then skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc dec over last 2 dc.
Row 11: ch 3 (counts as first dc), 2 dc all in first sc (same place as ch-3 just made), * skip next 2 dc, sc in next dc, skip next 2 dc, 5 dc all in next sc , repeat the directions between * and 2 more times, then skip next 2 dc, sc in next dc, skip next 2 dc, 3 dc in last sc.
Row 12: ch 1 (to turn), sc dec over first 2 dc, skip next dc, * 5 dc all in next sc, skip next 2 dc, sc in next dc, skip next 2 dc , repeat the directions between * and 2 more times, then 5 dc all in next sc, skip next dc, sc dec over last 2 dc.
Row 13: ch 1 (to turn), sc dec over first 2 sts, sc in ea of next 2 dc, skip next 2 dc, * 5 dc all in next sc, skip next 2 dc, sc in next dc, skip next 2 dc , repeat the directions between * and 1 more time, then 5 dc all in next sc, skip next 2 dc, sc in ea of next 2 dc, sc dec over last 2 sc.
Row 14: ch 1 (to turn), sc dec over first 2 sc, sc in next sc, sc in ea of next 3 dc, skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in next dc, skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in ea of next 3 dc, sc in next sc, sc dec over last 2 sc.
Row 15: ch 1 (to turn), sc dec over first 2 sc, sc in ea of next 3 sc, sc in ea of next 3 dc, skip next 2 dc, 5 dc all in next sc, skip next 2 dc, sc in ea of next 3 dc, sc in ea of next 3 sc, sc dec over last 2 sc.
End off, leaving a strand for weaving in. Weave in the ends, to secure.

Bib Strap Right-hand Side: Turn the Main Piece so that the starting chain edge is facing up, ready to be worked in next. You will work in the remaining loops of the starting chain.
Attach the yarn in the first starting chain remaining loop on the right-hand side of the piece.
Row 1: ch 1, sc in first ch, sc in ea of next 7 chs. You will now turn and leave the rest of the row unworked for now.
Row 2: ch 1 (to turn), sc in first sc, sc in ea of next 7 sc. (8 sc in row)
Row 3: ch 1 (to turn), 2 sc in first sc, sc in ea of next 5 sc, sc dec over last 2 sc. (8 sc in row)
Rows 4 - 11: ch 1 (to turn), sc in first sc, sc in ea of next 7 sc.
Row 12: ch 1 (to turn), 2 sc in first sc, sc in ea of next 5 sc, sc dec over last 2 sc.
Row 13: ch 1 (to turn), sc in first sc, sc in ea of next 7 sc.
Row 14: Repeat Row 12.
Row 15: Repeat Row 13.
Row 16: Repeat Row 12.
Row 17: ch 1 (to turn), sc dec over first 2 sc, sc in ea of next 6 sc.
Row 18: ch 1 (to turn), sc in first sc, sc in ea of next 4 sc, sc dec over last 2 sc.
Row 19: ch 1 (to turn), sc dec over first 2 sc, sc in ea of next 4 sc.
Row 20: ch 1 (to turn), sc in ea of next 3 sc, sc dec over last 2 sc.
Row 21: ch 1 (to turn), sc dec over first 2 sc, sc in ea of last 2 sc.
End off. Weave in ends.

Second Bib Strap: Turn the Main Piece so that the unworked side of the top row is on the right-hand side. Attach yarn in the first starting chain remaining loop on this side of the piece.
Second Bib Strap Rows 1 - 21: Repeat Rows 1 - 21 of the Bib Strap Right-hand Side instructions.

Sew one piece of the velcro to the right side of one strap, near the top of the strap and the other piece of velcro to the wrong side of the other strap, positioned so that it will line up with the velcro on the other strap.