Can I change the default textbox size?

I use textboxes a lot for entering part numbers and the default size in Acrobat 7 was perfect - about 7 characters wide. I'm now using Acrobat DC and the width of the textbox is larger, perhaps 15-20 characters wide. Is there a way to change this?

I've formatted the textbox the way I want and saved it as the default, but it only saves the colors and font, not the width or height.

Additionally, the text box appears below and to the right of where I click the mouse to insert it. Is this normal? I can get used to it but it is a bit annoying.