SoCal Swords
HF Armory Black Knight Mitten Gloves
$260
The "new hotness" in the HEMA scene right now. Everyone is talking about them for good reason. These offer great mobility and protection with an extremely durable design. These are a fantastic upgrade to your old clamshell/mitten gauntlets, and will last you for years to come. Keep in mind that they do break in, allowing for more dexterity the more you train with them.
Here is the sizing chart from HF. Note that they do not actually produce a Medium and Large separately, they produce a M/L, despite what the chart shows.