Typeface sizes changed

Hi eveyone. This is my first post. I was uploading some changes to my site and when I checked it all my fonts (on every page) have gone crazy. Some large, some small. Totally different from the original.
Any clues?

thanks,
Glendene

Hello ..

It's very likely a problem with your HTML code or your style sheets (CSS).

Regards,
Mat

Hello ..

It's very likely a problem with your HTML code or your style sheets (CSS).

Regards,
Mat
Thanks Mat. I am very much a newby but I will see if i can find where i went wrong.
Regards,
Glendene