website design - Standard numbers for responsive layout

What are the (standard) numbers to work with, when making css responsive layout?

@media screen and (min-width: px) {
    /* Mobile */
}

@media screen and (min-width: px) {
    /* Tablet */
}
@media screen and (min-width: px) {
    /* Desktop */
}

And

@media screen and (max-width: px) {
    /* Mobile */

}
@media screen and (max-width: px) {
    /* Tablet */
}
@media screen and (max-width: px) {
    /* Desktop */
}

Answer

Material design has a very complete section on Responsive UI layouts with numbers.

According to it the screen sizes in dp would go:

• xsmall: 0 - 600


• small: 600 - 960


• medium: 960 - 1280


• large: 1280 - 1920


• xlarge: 1920+