... tell us : The length---generally it is 6'',8'',10'',12''......28'',30'',32'' Needed color ---You can tell us your color ... ear across hairline 10.8 ear to ear over top 12.5 temple to temple 14.5 nape of neck 4 ... front to nape 15.5 ear to ear across hairline 12 ear to ear over top 14 temple to temple 16 ... , #1b,#2,#3,#4,#6, Medium color:#7,#8,#10,#12,#14,#16,#30,#33,#130,#350,#530,#99j,#144Light color ...