Tip:
Highlight text to annotate it
X
Small size text appears in Message section of Skype
Goto Tools > Options
Goto: IM & SMS > IM Appearance option
Click 'Change Font' button
Select bigger Font size
Now text appear in bigger & larger font size
Change Windows Apperance for larger text in other Skype sections
Right click on desktop & click 'Screen Resolution'
Select lower screen resolution for bigger font display
Click 'Make text and other items larger or smaller' option
Select medium or larger option for bigger font size
Click Magnifier option to use this feature
It helps zoom on specific parts of the screen
These are best work-arounds for larger font size in Skype