all wigs are one size fits all with stretch caps. There are no options for customizing cap size.
t part lace wig:
wig has lace in the shape of a T lace is in the parting space as well as around the edges of face and does not require glue,
view image below
lace part wig :
wig has lace down the part space only, this wig does not have ear tabs and can be easily shifted for a side part and does not require glue,
view below image 
free part lace :
wig has 13x4 or 13x6 lace front at the top of wig, with lace around the whole front perimeter and can freely part any direction with no tracks sewn at the part space, does not require glue,
view image below
non lace wig (throw on and go)
wig Has no lace and is ready to wear, with have a scalp appearance in the parting space. Does not require glue,
view image below
easy cap lace wig:
wig has lace in the part space only with a realistic lace part, lace is pre cut for easy use, wig has an added elastic band for security with no ear tabs for shifting capability,
view image below