just 10 inch, but it said to support HDR (via presets and user LUTs) so I wonder if it can be used for technical development of hdmi hdr output?

https://www.feelworld.cn/ShowInfo.aspx?id=743&py=FEELWORLD-LUT11S-10-1-Inch-Ultra-High-Bright-2000nit-Touch-Screen-DSLR-Camera-Field-Monitor-with-F970-External-Power-and-Install-Kit-3G-SDI-4K-HDMI-Input-Output-1920X1200-IPS-Panel

wow, this is URL .....

pros: cheap, compared to real HDR professional big monitors.

cons: physically small.