All measurements are recommended and in pixels.
Slider:
Width: 1400px
Height: 507px;
Post featured image full width:
Width: 1170px;
Height: 460px;
Post featured image:
Width: 848px;
Height: 461px;
Logo
Width: 121px
Height: 46px
Featured post Widget
width: 150px;
height: 150px;
Recent-post Widget:
width: 67px
height: 67px