changing the size of SSL siteseal in payment icon area

[sennon]

I set SSL siteseal in payment icon area.
But it is not the correct size.
How can I change it’s size?

Sorry for too many questions at once.
I can work on my magento shop only at night after work.
It’s time consuming asking questions one by one.
Please don’t mind and answer my questions as far as you have time.

[Author]

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