Comparing between jumbo and medium size rollers. Shown in the video. The jumbo rollers are on the left and medium on the right. Couple of things things I noticed: Jumbo rollers, take up more space and hair surface area which means less is needed. However, the medium creates more curl definition. My ideal way to use it is to use the mediums on top and jumbo on the bottom. For medium to medium/short hair, medium rollers are ideal. I also used my thermal rollers to add a little bit of heat and smooth before adding the rollers. Add light to medium, hold spray to keep the volume or longer.