The default font is medium sized, which is OK in most cases but in some areas the default font is still used where it should definitely be set to the smallest font. These are the ones I found so far:
# Inventory capacity used is too big (medium font). Other bars used in factories/shipyards are fine though.
{F23626}
# "Filter By Type (off)" "MOTHER SHIPS", ... all bottom menu drop down bars used in navigation menu, catelog menu, fleet menu ... are too big.
{F23628}
{F23639}
# Expandable list item description used in catalog items diplomacy factions are too big.
{F23630}
{F23632}
{F23634}
# "Characters Left: ..." often clips through the OK and Cancel button. Varies from menu to menu. It is correct for "Edit Faction Description" so perhaps use that as example (could use a few extra pixels though)
{F23636}