Round-shaped or rectangular-shaped speech balloon designs are the most commonly used but there are many other shapes that can be utilized to portray emotions or characteristics of message delivery. In the fifth part of the speech balloons series, different speech bubble shapes is discussed. Here are several examples of different balloon shapes.
Angry Speech Balloon
An angry speech balloon is displayed with a fiery appearance to express the heated anger a character is feeling.

Announcement Speech Balloon
An announcement speech balloon indicates a proclamation. It is shaped like a scroll or a formal document.

Broadcast Speech Balloon
A broadcast speech balloon typically has jagged or lightning bolt tails and a square or jagged outline. They indicate the speaker is communicating via electronic device, like a radio or television. The dialogue is sometimes italicized.

Icicle Speech Balloon
An icicle speech balloon has icicles handing off of it to indicate a cold attitude or chilly atmospheric temperature.

Monster Speech Balloon
A monster speech balloon has slime or blood dripping off it. They are usually spoken by a scary creature.

Uneasy or Wobbly Speech Balloon
An uneasy or wobbly speech balloon has shaky lines indicating a character is unsure, feeble, queasy, sick, baby talking, singing, or drunk. The words inside the balloon are usually wobbly too.

Shout/Scream Speech Balloon
A scream speech balloon indicates a character is shouting. They typically have a jagged outline with a thicker line. The text is usually larger and bolder than other speech.
Whisper Speech Balloon
A whisper speech balloon is usually conveyed with a dotted outline or an unsteady shape. The font is usually smaller than other text, and the lettering is usually lighter in color to indicate the speech is softer.

Next time: Thought Balloons (Part 7 of 8) will be discussed.