Product review (4 stars): Dimensions listed are wrong.
I believe that the dimensions listed here are incorrect.  Other sources list the the dimensions as 13x10 not 11x10.  This can be very confusing when one is paying attention to actual details.  Look at the associated proper pad/filter for this and you will see the discrepancy.  (such as Honeywell Enviracaire HC26E 1004 Humidifier Filter).  I am going to order this for my HE265B and I hope it fits.  Hopefully the vendor will agree and fix this and state inside dimensions vs. outside dimensions.  I will update this review if I find that my statement is incorrect - but based on vendor stated dimensions, something is off.