Sorry we are only able to offer five sizes at this time because grading more than 5 sizes is very costly and at this point we do not have the demand to support this cost.
In pattern making you can make a sample and size up 3-5 sizes at the most. Once you add more than 5 sizes to the original pattern the pieces become skewed and won't correctly. To properly add more than 5 sizes a completely new pattern and sample have to be made and then sized up. A typical sample is 5x the cost of the original piece because of the time of fitting and re-making to tweak the piece. Because of this, we can not afford to make sizes above xl with the current demand we have for these sizes. When we have a larger demand (or when you wanna help us with this investment :)) we would love to add these sizes!