120 × 80 is a pretty decent small thumbnail.

160 × 106 is a pretty decent thumbnail.

240 × 159 is a bit small for viewing.

320 × 213 is a good size for a quick look or a blog post.

400 × 266 is a nice size for a blog post.

512 × 340 is starting to get big for a blog post.

600 × 399 is a good size for viewing or emailing.

640 × 425 is a good size for viewing or emailing.

800 × 531 is a good size for viewing or emailing.

1024 × 680 is a good size for viewing or emailing. At this size and above, many computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

1152 × 765 is starting to get a bit big for viewing or emailing. At this size and above, many computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

1280 × 850 is starting to get a bit big for viewing or emailing. At this size and above, many computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

1360 × 903 is getting a bit big for viewing or emailing. At this size and above, most computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

1440 × 956 is getting a bit big for viewing or emailing. At this size and above, most computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

1600 × 1063 is too big for viewing or emailing. Printing: 5.3" × 3.5". At this size and above, most computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

1680 × 1116 is too big for viewing or emailing. At this size and above, most computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

1920 × 1275 is much too big for viewing or emailing. Some large monitors can display these at the monitor's maximum size. At this size and above, almost all computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

2048 × 1360 is far too big for viewing or emailing. Only the biggest monitors available can display these. At this size and above, many computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

2560 × 1700 is WWWAAAAYYY too big for viewing or emailing. Only the biggest, and most expensive monitors available can display these. At this size and above, many computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.

3200 × 2125 is ridiculously large for viewing or emailing. At this size and above, many computer monitor resolutions are too small. Click the "Maximize" button beside the close (×) button to see just how big this really is.