Mind Size Brain Size
Mind Size, also called Brain Size, is a two-panel reaction image where Megamind (or Markiplier) grins next to a washing machine dial cranked up to indicate massive intellect. It started on Reddit in February 2020 and spread across meme subs within weeks, spawning a Markiplier-based sequel that used the Big Brain Time template.
Overview
Mind Size, also known as Brain Size, is a reaction image built around the animated villain Megamind smirking next to a washing machine dial labeled "Mind size" that is turned up to "Mega"1. The dial graphic is lifted straight from the earlier Oof Size Large template, which gave the joke a plug-and-play feel that meme readers picked up on immediately3.
A companion version swaps Megamind for YouTuber Markiplier with a comically inflated forehead, borrowing the visual from the Yeah, This is Big Brain Time meme, and relabels the dial "Brain size" set to "Large"6. Both variants function as bottom-panel reactions, sitting under a top image or caption to signal that whatever appears above is either genuinely clever or so stupid it loops back into brilliance3. The tone can be earnest praise or dry sarcasm, depending on the setup.
How It Spread
How to Use This Meme
The template is a two-panel image macro. The top panel is typically a screenshot, text post, or caption presenting some clever, absurd, or oddly-logical take. The bottom panel is the Megamind or Markiplier reaction with the dial cranked to Mega or Large. Users often swap only the top panel, keeping the reaction image untouched. Sarcastic use is common, applying the Mega dial to something obviously dumb so the contrast does the joke.