DIY archer VOR antenna ?

There seems to be a couple different drawing and they have different measurement.

The hand written drawing here on VAF says 5" each way for the triangle portion with 12" and 16" legs.

There's also a drawing in the aerolectric book that looks to be the same ish, and there's a drawing on that site that give specific lengths and none match the other drawings. Which is correct?

Likely all of them. Bob Archer has both comm & nav antennas, and variations to fit numerous different wing tips, that have varying space for the antenna.