Crochet Abbreviations
ABBREVIATIONS
BPdc - Back Post double crochet(s)
ch(s) - chain(s)
cm - centimeters
dc - double crochet(s)
FPdc - Front Post double crochet(s)
mm - millimeters
Rnd(s) - Round(s)
sp(s) - space(s)
sc - single crochet(s)
st(s) - stitch(es)
YO - yarn over
or 
— work instructions following or as many more times as indicated in addition to the first time.
to 
— work all instructions from first † to second † as many times as specified.
( ) or [ ] — work enclosed instructions as many times as specified by the number immediately following or work all enclosed instructions in the stitch or space indicated or contains explanatory remarks.
colon (:) — the number(s) given after a colon at the end of a row or round denote(s) the number of stitches or spaces you should have on that row or round.
BPdc - Back Post double crochet(s)
ch(s) - chain(s)
cm - centimeters
dc - double crochet(s)
FPdc - Front Post double crochet(s)
mm - millimeters
Rnd(s) - Round(s)
sp(s) - space(s)
sc - single crochet(s)
st(s) - stitch(es)
YO - yarn over
or — work instructions following or as many more times as indicated in addition to the first time. to — work all instructions from first † to second † as many times as specified.( ) or [ ] — work enclosed instructions as many times as specified by the number immediately following or work all enclosed instructions in the stitch or space indicated or contains explanatory remarks.
colon (:) — the number(s) given after a colon at the end of a row or round denote(s) the number of stitches or spaces you should have on that row or round.