I believe that 14 count fabric is 14 squares to an inch, therefor 24-count fabric is 24 squares to an inch
so the squares will be smaller to squeeze an extra 10 squares into that one inch. There is such a thing as 24-count Congress cloth but I've never worked with it....

Have you considered using 22-count evenweave fabric? The squares are small but not so small that you would have a headache trying to see.....

I have not tried anything else.. I have only use 14 count. Eyes are not good so I'm not sure I can see the squares on the 24 count. I will have to check on the other options. Thank you for the suggestions. Greatly appreciated.

Hope to hear what fabric you will use. I'm a cross stitcher with poor eyesight and cataracts to boot so I have a lighted magnifier that helps a lot. I do a lot of 28-count. Have a happy Thanksgiving! :)