Hi Nan...I use a medium cushion with the P10 and ordered the same size for the P30i. I was pleased with the fit and even found the medium P30i to be more comfortable. Hope this helps. Have you tried the Dreamwear with pillows? I am waiting for my p30i cushions to come (beyond excited as I love the ...

Hi Nan...I use a medium cushion with the P10 and ordered the same size for the P30i. I was pleased with the fit and even found the medium P30i to be more comfortable. Hope this helps.