Pre-2020 Jumbos are 6 by 8 inches
Still, if youre strapped for cash and looking for a creature doubler, you could do worse (though not by all that much)
Yarok, the Desecrated One of the best horror commanders, Yarok, the Desecrated is Panharmonicon on legs, and the Sultai colors are already known for having good cards with ETB effects
If you're feeling friendly you can look at Howling Mine and Font of Mythos as other artifact card draw options for your red deck, just beware of giving other players more cards too
You may be sacrificing customer service and ubiquity offered by the name-brand competitors, but in terms of sheer value, its hard to beat these sleeves
So basically this is the hey look over there! card, or the wait-until-your-opponent-gets-a-phone-call-and-then-put-it-on-the-field card