Diamond earring jackets for cushion shape?

[Snowdrop13]

Hi All, I have 2 pairs of earrings I wonder if I could manage to "jacket" with the same new item! The first pair are cushion shaped pink sapphires, 3.5 mm size- would they be ok with round jackets? The second are my daily wear 0.33ctw diamonds which face up a similar size. Whiteflash have great jackets for 0.3 and 0.5 ctw, any advice on which I should purchase? Thanks you guys.........