This latest batch is maybe 1/8" wider and taller than the prior batch-- enough it's hard to fit in the plenum. I think I was able to get it in there well enough to seal. But it will make me think before buying more.
[This review was collected as part of a promotion.] These filters are incredible. My AC was freezing up, so I call a repairman. Turns out, the filter that I originally bought was too thick. Luckily I had ordered these Merv 8 pleated filters. Thats all that I will buy from now on.