Most electrical plugs in KSA are 220 volt and usually the type shown.  Hair dryers are usually available in most hotels, but for electric razors or flat irons you might need a converter.  

Please note that some 110-volt devices from USA/Canada will typically be ruined by 220-volt outlets.  Although phone and laptop chargers are compatible with both systems, you’ll need a converter like the one shown from Amazon for your device(s).