When pasting HTML into the define pages editor in the admin panel, is there a maximum file size that it will accept?

I want to extend our coming soon gallery:

http://www.silkblooms.co.uk/index.ph...ge=coming_soon

I'm at row 31 at the moment but want to increase to 100 rows as it's proving a very, very popular way for our customers to choose new designs.

when I paste the HTML in with 100 rows, it appears to save but in actual fact saves as blank. When I go back in to edit, there's nothing there.

I'm assuming there's a maximum file size? Does anyone know what that is and if there's a way to override it? I don't really want to extend it to a second and third and fourth page.