Invoice print in A4 sized paper

Hello team, as iam trying to get a print of A4 Invoice when a payment processed on account so we can take a sign from customer and sent back to motel so they pay each month , as I need in a followed format I can print it but I am not getting bigger fonts iam using brother laser printer so when a account transaction done it will print pls find attachment , also it would be good if i can print a statement example of total amount need to pay and when what tickets was created but iam not sure is this possible or not thanking you
This is what I reached ,

Example of what iam looking for,