what should be the size of flyer?

I can see, the pdf is A4 size. Do you want the flyer to be so big?

Hello PO,

Thanks for the invite, but it seems that your project is near to end.
Could you please extend the closing the date so that for me and other designer you invite will have some time to deliver a concept for your project.

Thanks.

What is the number for the phone number?

Flyer should be A4.