Pic size of incoming caller id

[hooksworld]

Help please! I have a picture of my daughter that shows up when she calls. It is a large and clear picture, but when I get calls from others in my phonebook whom have pics associated, they show up so small that I can barely recognize the person. Can anyone offer or suggest what I did to make one pic large but the others come out so small? BTW: Just using the stock caller id function.

Thanks in advance.