Always measure with a measuring tape, do not assume that your painting is a standard size.
Make sure to indicate if the piece is NOT squared. Also we need to know if it is bowed in the middle.
This filet is the little gold line.
This filet is the linen liner.
First thing you need to decide is gold metal or real gold leaf because it will greatly affect the price of the frame.
You may want to combine mouldings and make a little sketch like this.
You may want to do a little sketch here also.
You can make variations of the designs you see and a picture is worth a thousand words.
You can beef up your frame when you want your piece to hang flush to the wall.