You know, width is at least as important as length.
Go measure your penis width.
If it is thicker than 4.5 centimeters: Good, your dick is large enough to please this girls.
Do 60 fast strokes enjoying their breasts.
If it is thinner than 4.5 centimeters: That little match would not be able to please them. Seems like you can only serve them as cum dump. But see it positive. That way the bigger dick does the fucking, which gets the most enjoyment out of all participants.
Do 30 fast and then 15 slow strokes while looking only at their delicious cocks.