what size gasket paper for exhaust mani? lost original

so im building the engine and cometics exhaust mani gasket is shamefull, it might just be a templete, if so, thanks for taking my dollars.

okay, so i threw the old gasket away, all i have to go on is a replacement gasket i bought for the pipe, its a thickish green material with the number 4000, THERE seems to be a digit infront too but its cut off, it may just be another print...idk

can someone shed some light?
 
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