My monitor is VESA compatible, which VESA sizes does NecDoctor for DESK support?

NeckDoctor for DESK features a 360° rotary quick release removable VESA 75×75,100×100 compatible plate for simplified monitor fitting & optimal viewing experience. You may also refer to the standard VESA chart below for reference:

Of course. You can fit a NON-VESA imac to NeckDoctor for DESK via using a VESA adapter for 21.5″ & 27″ imac, refer to the image below:

All product and company names are trademarks™ or registered® trademarks of their respective holders
Category: NeckDoctor for DESK