That's because 96 & 108 are standard sizes. They are divisible by 12 as in + to 1' ie: a room w/ 8', 9' or 10' ceilings depending on where you want the rod to hang and the curtain break to be.

There is a seller on etsy I like who has very reasonable drapes and will likely make you custom 100". She has a lot of 96 and 98.

I've ordered pillows from her to test quality (excellent), and I'm going to order drapes as well once I figure out what I want.

Here is a link that might be useful: Etsy Shops

Sorry - meant "divisible by 12, as in = to 1' ".

Thanks for your responses...I will check in with Etsy and hope others will chime in with some other suggestions!

Thanks for your responses...I will check in with Etsy and hope others will chime in with some other suggestions!

I bought drapes twice from this company...pinch-pleated, lined for patio sliders and pinch-pleated, lined panels for two other windows. Am satisfied with the quality; price was reasonable--a good value. You might check to see if 100" ones are available there.

I'm not associated with this company in any way but as a customer.

Here is a link that might be useful: http://www.factorydirectdrapes.com/

If you can find a material and design you like, JCP will customize many of of their stocked drapes. It doesn't cost that much more and I've had them do 100" and 104".