Sure, the number of characters in a text can be considered as an important factor for readability. In this case, the text is about RSS reader and it seems to be quite short with only 14 characters. This might be a good reason to consider using a smaller font size or adjusting the text's length if you want to make it more readable.

RSSをいい感じに表示している箇所

https://github.com/nikolat/ghostbook/blob/fd0c7806fb8771ccf772ac06307ff7f92d2ab6b8/ghost/master/dic/normal/yaya_event.dic#L153-L186