3/32“ / 0.0925” / 2.35mm
Metric: 16cm x 13cm w/ 45° off each corner (13mm).
Inches: 6-1/4“ x 5-1/8” w/ 45° off each corner (1/2“).
A “Z-spacer” may be needed but not always.
See the dedicated Z Spacer Thingiverse collection page or take a look at few listed below.
Monoprice Select Mini Glass Bed Spacer
MP Select Mini Z Spacer (customizable, no disassembly!)
MP Select Mini Z Spacer (snappable)
There are many ways to attach the glass to the bed to prevent it from moving while printing. See the Thingiverse collection below or on the dedicated Glass Bed Clips Thingiverse collection page.
Binder clips are an easy way to clip the glass to the bed. You'll probably need to adjust the placement because the stock fan shroud can catch the binder clips in some locations.