While my photos usually are ~ 150kb average, I find some to double that size under the same settings. Specially Black & White photos.
Is this size normal, because of the amount of different tones or am I missing something?
Settings: JPEG, RGB, 8 Bits, width 960px Saved with Photoshop at quality level 8
Example: https://www.dropbox.com/s/xm7nesnlq945tt6/_MG_8281_bw.jpg?dl=0