For the pipes, you'll want it to be 1.5 inch thick pipes.

For height, go for about 8 feet high for your setup since you're quite tall haha. You may need to also have the frame interconnecting to make it more stable. For width, stretch out your arms and turn around and around. That's about how much space you want.

For the blankets, if you're going with:

Vocal booth to go blankets (weighs 10 pounds), 1 per side

Suremax (5 lbs per blanket), 2 per side (72 X 80). These are 5 pounds per blanket:

https://www.amazon.com/Sure-Max-Heavy-Duty-Moving-Packing-Blankets/dp/B01GK6JUOE/ref=sr_1_3?

Sure max 2.75 lbs per blanket, 3 per side (72 X 80). These are 2.75 pounds per blanket.

https://www.amazon.com/Sure-Max-Moving-Packing-Blankets-Furniture/dp/B073V5CRQ7/ref=sxin_14?

When it's per side, it means top, left, right, behind and front. So if you're using the typical 12 pack (2.75 lbs per blanket), that's 3 per side so that means 15 blankets.

For placing the blankets onto your PVC booth, there are 2 approaches

Approach 1 is to use clamps. Large clamps with a wide jaw.

https://www.amazon.com/HORUSDY-6-Piece-Spring-Clamps-opening/dp/B08FHDQJ6W/ref=sr_1_2?

Approach 2 which is easier with Acoustic blankets is to use carabiners with rings. That allows you easily slide the blankets across.

ie carabiners: https://www.amazon.com/Gold-Lion-Gear-Pack-Carabiner/dp/B07715VC1T/ref=sr_1_5?

2 inch welded rings: https://www.amazon.com/Multi-Purpose-Macrame-Camping-Leashes-Accessories/dp/B07PN6KVGZ/ref=sr_1_4?

Place the rings over the PVC pipe and have the carabiners connect to the ring and the grommet hole of the acoustic blankets - and now you can move your blankets like a curtain.

For lighting you can use LED rope lighting:

https://www.amazon.com/Waterproof-Daylight-Certified-Connector-Accessory/dp/B07QCNL9R5/ref=sr_1_11?