Pixel sizing in Character font selection

As Brad pointed out, using some unit measure other than pixels can be misleading. Unfortunately, even though Photoshop is a pixel based program, it really uses points for type. Using pixels for type can create some bugs in sizing, if I recall.

"numerical"?

If you mean you want your type in Points, go to:

Preferences > Units & Rulers > Units: Type : Points

If not, explain further.

You should know that using Points in a pixel-based image can be misleading as it depends on the Resolution you have set for the image. e.g entering 60 pt type on a 300ppi image will appear twice as large than when entered on a 150 ppi image.

Conversely, using type units in Pixels: 60 px type will be the same size no matter what the image resolution.