That photo is just for a side by side comparison of the standard size and compact size.
1 Philips COMPACT Sonicare ProResults Standard Replacement Toothbrush Brush Head
Philips 3 COMPACT Sonicare ProResults Standard Replacement Toothbrush Brush Head
3X Philips Sonicare ProResults HX6013 Replacement Toothbrush Brush Heads
6X Philips Sonicare ProResults HX6013 Replacement Toothbrush Brush Heads New
Philips Sonicare ProResults HX6013 Replacement Toothbrush Brush Heads - 6 Pcs
