Semi-custom means I provide the wrap and you get choices on sizing.

WHAT YOU ARE BUYING

the wrap itself and a basic custom conversion (so, the fabric and the sewing, and some choices on size).  The balance of the payment for any additional optional add-on features is due when the carrier is finished. Allow 2-6 weeks to complete the carrier. You can choose to upgrade to a premium conversion if desired.

http://www.obimama.com/custom-mei-tai-order-forms

The Wrap

is a Butterfly Baby Cabana Under the Sun. A bright and cheerful rainbow, thin but resilient. This wrap is suitable for all wearers and ages. It’s a workhorse, you can’t bust it.