Looking for advice on serving sizes and pricing!

I’ve always loved making charcuterie boards for events and as gifts but recently began selling some just to some local folks around my community. Wondering if you have any advice on pricing my boards and how to gauge serving sizes. These are 2 boards I sold recently, wondering what y’all would price them at? All in (boards and packaging materials included) I spent about $250 total. The medium sized one was a little larger than 1ft by 1ft and the larger one was right around 2ft by 1ft. Additionally if anyone has any advice on general rule of thumbs for #of people to how big of a board you do would love any help. TIA!