Looks a bit oversized but that is a good thing.
Suggest cutting down to correct size, dry fit with neck clamped on top of shim, and then check neck break angle and how high strings might be above bridge saddles.
If all looks good, glue shim 1st, allow at least 24 hours and then glue neck.
If it is a bit high above bridge it may need a small amount trimmed off the thick end of the wedge.
Cheers, Waz

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