Set up with your toes elevated by roughly 2 inches, dumbbells resting on your thighs, core braced
Slowly slide the dumbbells down your thighs. Feel like your butt goes to the back of the room
Lower the dumbbells until you feel a stretch through the back of your legs
Note that you will feel a greater stretching sensation with the toes raised verses a regular Romanian deadlift, this is due to the position of your ankles