To change photo size, click "Go to"
Then scroll down to "My account", and click it.
On the right side of the page that appears, note your current photo size. Click "Change" @ right.
Find "Photo view size". Click arrow box to the right. A list of choices will appear (not shown). I suggest 800 x 800.
This will make your pics appear on the larger size, but not so big that you cannot see from one edge to the other. For those with smaller monitors or notebooks, this could be a real advantage.