size please...?

I would like to ask for the size of the design and the way you want it .. do you want it fun or serious ? colorful or only 1-2 colors ? and finally how will we change your logo ? please attach your new logo ..

Thank you the questions. I need a normal certificate size which is probably size A4 or A5. Serious not fun, only the colors of the logos are allowed. The less busy the better. There are no changes to the logo. Just simply replace the word Academy to Center in the logo. That''s the only change I require. I have already uploaded the logo.

A4 is the required size. Horizontal.