Hey @Megan! That sounds like an awesome job you have! Unfortunately we don't have any gaiters that are rated for snakes. It will offer more protection over nothing though! I thought this Outside Magazine article was a good read about snake bite protection.
Here are some great options for those hot Texas summers:
- REI Co-op Backpacker Low Gaiters
- Outdoor Research Bugout Gaiters
- Outdoor Research Verglas Gaiters - Women's - These women specific ones might be the most slim for your calves.
- Kahtoola LEVAgaiter GTX Gaiters
Looks like with your shoe size you will need a size small according to most of the size charts. Also, here is a great Expert Advice article that might help narrow down exactly what you want in "How to Choose Gaiters." Hope that helps and best of luck with your job!