How much space does a Thai re-entry permit for non-O visa holders occupy in your passport?

@Tod ********

You are absolutely correct... This is from my current passport. Altogether they wasted four entire pages of my new passport. On my old passport the (now voided) re-entry permit was placed the 'usual way' horizontally

@Tod ********

Sorry, not at my PC, used a pic from this page

@Jing ***

My last one was squeezed in, at 90 degrees, on the page opposite the associated extension. They did it off their own bat; not at my request.

@Jing ***

Depends on the immigration office/officer. As Robert says, you may ask

@Jing ***

You are free to ask.