Fully layered editable PSD you can resize and re-adjust all elements to desired result. I’ve built a right arrow in the file if you want a left arrow as well by using transform > flip horizontal and then also can shape any direction you want.
Designed for both web and keynote
Actual sizes of each button are 256px, 128px, 64px, 32px
Transparent .png is included
This file is originally built on Adobe Photoshop.