Similar to the regular icon, the speech bubble icon is also used primarily in marketing collateral like stickers, banners, prints, slide decks etc.
For print media, the width of the speech bubble icon should not be reduced to less than 15mm. For digital media, the width should not be reduced to less than 43px.
The clearspace minimum is equivalent to the vertical height of the "TY" in the Icon (shown here as x), regardless of the size at which the icon is reproduced.