The Trial Pack of 3 reusable period pads is a great way to get a feel for size and absorbency, a perfect opportunity to try what size works best for you without going all-in. 1 x Medium Flo and 1 x Mega Flo and 1 x Mega Mega This pack has been put together for people with heavier bleeds, for lighter bleeds, the Lighter Trial Pack might be more suited to you. The pads attach to your underwear the same way a disposable would, they have wings with double nickel-free poppers for a nice secure fit. Medium Flo 6.5 cm (2.55 Inches) wide at the middle and 22 cm (8.6 Inches) long Mega Flo 7 cm (2.75 Inches) wide at the middle and 26 cm (10.25 Inches) long Mega Mega Flo 7.5 cm (2.95 Inches) wide at the middle and 29 cm (11.4 Inches) long