I've not obtained new crush washers yet - I'm still reusing the ones on the car. Here are some measurements I took on the washers:

The two 8mm 12-point spline plugs in the rear oil line "U"s (#7 and #8) use a copper washer that is 15.6mm OD, 12.6mm ID, 1.15mm thick.

The T30 plugs in the block and transmission (#2, #3, and #5) had no crush washers, but if they had one it would be a 9mm ID with a max OD of 13.5mm.

The M12 spline plug on the bottom of the oil cooler (#6) uses an aluminum crush washer that is 13.7mm ID, 20.18mm OD, 1.4mm thick.

The copper washer under the 8mm hex plug on the engine (#1) measured 18.2mm ID, 22mm OD, 1.22mm thick.

The 13mm hex bolt plug on the engine (#4) used an aluminum crush washer that measured 14.18mm ID, 19.88mm OD, 1.33mm thick.

I have no data on the torque specs, yet. I make them "snug" without over-tightening.