Too big for what? How do you hunt? How far ya got to pack it?
I hunt a lot of geese in the fields and ducks out of my boat. My bag is about 18 inches long x about 12" wide x approx 10" tall. It slides into the bottom of my layout blind, between my feet and keeps the foot portion of my FA Xlander from collapsing when I climb in and out.
I love low profile blinds.
In the boat it keeps my shells, extra gloves, foot warmers, face paint and baclava (sp?) dry.