Google SERP Preview

Google truncates search result titles and descriptions based on pixel width, not a strict character count, so the exact cutoff varies slightly depending on which characters you use (a title full of narrow letters like 'i' and 'l' fits more characters than one full of wide letters like 'w' and 'm'). This tool uses the commonly cited approximations of about 60 characters for titles and 155 characters for descriptions, the same simplified approach used by most SERP preview tools.

This shows you a close approximation of typical desktop search result styling. Google sometimes rewrites titles or descriptions automatically if it judges your provided version to be a poor match for the search query, or generates a different snippet from your on-page content entirely, so treat this as a strong guide for what you're providing Google to work with, not a pixel-perfect guarantee of the final result.