As the doc mentioned,the launcher icon is 48*48dp.
So I think the launcher icon should be 144 * 144px on my nexus 5.
But I research a screenshot of my nexus 5,I find it's almost 166* 163px.
Why it's bigger than 144*144px?
Is my method of calculating the size wrong?
(p.s. an app with a 144*144px icon in the drawable-xxhdpi folder is also shows 166* 163px in the launcher.)
This is my screenshot: