Which is a better performing ad ? 125×125 or Rectangle ads ?

I’ve been trying to figure this out recently but in vain. The sponsored ads that you see on the right hand side of DailySEOblog are all 125×125 ads, a common format you see on many blogs. Reason why I opted for them are because most advertisers are aware of the standard format and would have the ad banners ready at 125×125 pixels.

But I think now the 125×125 ads have become “too repeated” and users tend to avoid them just like they avoid the old 468×60 rectangle banners. Call it “Ad blindness” or whatever but its a fact.

I’ve checked my stats for these ads (on the right hand side) and they have increased over the years because I’ve been introducing new ads often. Whenever the same ad remained for more than four months, things start to come to a plateau, which is bad.

What could be possibly happening with the 125 x 125 ads that people are avoiding it ?

- Same banners and even same sponsors on every site

- The format is very “seen enough of it” kind

- Sponsors fail to grab attention by not bringing in new/variety ads but repeating them

What could be done to revamp the sponsored ads viewership ?

- Bring in different and not-seen-earlier kind of ad formats.

- Bring in newer and varied ads, rather than repeating the same on every site.

What else could you think of ?