There are new changes for Facebook timeline profiles. Facebook will increase the size of profile images on timeline pages to 160 pixels by 160 pixels, from 125 by 125, the social network announced to page owners. This change will be implemented Thursday.
For brands that incorporate their profile images into their cover photos, in addition to the increase in size, it should be noted that the profile image will be changed slightly as well.
Read more details on these changes at allfacebook.