Stuck where to put custom paypal button checkout code

Anyone can help I generated Paypal checkout button code and used a custom button graphic URL but where to put the Paypal code in the page?

I have bootstrap HTML page but hired someone to do that from image

Well... you put it where you want it.
Pm your site/page + desire button code and I'll point it out for ya.

I have ahref image source line so where do I put the Ppal?

I replace this ahref with the paypal form code but the button got very big and dont know where to get the button to the proper button size

<a href="#"><img alt="Buy Now" src="image/buy_now007.png" style="width: 150px;" />
</a>