How many grommets are on a sound blanket and what are the locations and sizes of those grommets?
Thank you.

Bill

Depends on how much tension you place on them and how sturdy the fabric is.

I rigged up some lightweight ones with mattress pad covers and grommets from the hardware store. Also one of those spongy mattress pads. I had to use some leather patches for the spongy because the sponge was too light to hold the grommets without tearing the sponge.

Ty Ford

Ty, thank you for the reply.

These are the heavy premium ones 6.9 lbs each. I was thinking one in each corner and either 1/2" or 3/4" grommets, using backing cloth for extra strength.

Bill