Kral Arms magazine size

Question for my AGN family,
I recently aquired a Western Sidewinder in 25cal with 3 mags, these are not cheap magazines so I dont want them laying around or hanging in my pocket while out in the woods. I came across this magazine holder for Kral magazines but I cant find the magazine dimensions to know if the Sidewinder mag will fit. Does anyone have a Kral Arms magazine that they could measure the width and depth for me.
Here is the device Im looking at for my storage.

If anyone else has magazine storage solutions I would love to hear it. Ideally I would like to mount the magazing holder to the rifle rail.

Thanks in advance.
 
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