Pictures with same size and looks different Android

I have 2 pics with same size (64x64) and same resolution but one is correct and the second one is giant !

They are in button on the left. It is very strange ! I don't understand why it's happend.

If you have an idea, it will be great :p Thx

This is my 2 buttons xml :

<Button
                android:id="@+id/PositionButton"
                android:layout_width="fill_parent"
                android:layout_height="55dp"
                android:background="@drawable/plus_minus_button_style"
                android:layout_alignParentBottom="true"
                android:layout_alignParentTop="true"
                android:drawableLeft="@drawable/establishment_address"
                android:paddingLeft="10dp"
                android:text="Default Address"/>

 <Button
                android:id="@+id/PhoneButton"
                android:layout_width="fill_parent"
                android:layout_height="55dp"
                android:background="@drawable/plus_minus_button_style"
                android:layout_alignParentBottom="true"
                android:layout_alignParentTop="true"
                android:drawableLeft="@drawable/phone"
                android:paddingLeft="10dp"
                android:text="Default Phone"/>