We often get requests from customers to make all sorts of changes to a tallit. They like a certain tallit but want to change the striping colors, or they like a certain atara, but...

We're not in the business of manufacturing tallits. We're a tallit seller. We sell tallits made by a half-dozen different manufacturers. That means we do a bit of finishing work, namely tying on the tzitzit for most orders, and sometimes sewing on a special atara and adding custom letter embroidery to a tallit bag.

So when a customer says they'd like a certain tallit, just modified so-and-so, we tell them that may be doable, but we'd have to contact the manufacturer, put in an order for around 5,000 and then wait six months of so. (The one exception is our handwoven tallits, see below.)

We used to have an option for custom name embroidery on the tallit, but we no longer offer that service. Most tallit sellers just embroider straight on the tallit. I never liked that, because it means the letters show in reverse writing on the back of one of the corners, and since tallits flip around constantly that's going to show a lot. We did come up with a solution, but it's quite labor intensive and increases the fulfillment time considerably, so it's not really a viable option. So for personalization, the only option we offer is name embroidery on velvet tallit bags. 

Most traditional tallits sold today are production-line wool tallits. They are made in very large batches, and cannot be customized. On the other hand, we also sell handwoven tallits. Since these are made on a hand-loom, one piece at a time, we can take a design and modify it, and can easily adjust the sizing. And we can also customize the lettering on the atara (neck band).