5 Year Update On 44 Pro Signature Series First Base Mitt 

I know you have a bunch of 1B mitts, but you might be interested in the Wilson 2820 (12.25") or 2800 (12"). It is rare to find a PRO DCT-style 1B mitt less than 12.5" Llerandi gloves also has a 12" mitt available as a custom option (2800 pattern). I have the Rawlings PRO FM20XL (12.25") but it is oversized (runs closer to 12.75" or 13") so you probably wouldn't like it.