Limpets

Limpets

Observation - Limpets. Description: Can someone help with an ID for these please? I thought these were Chinaman's Hats (Calyptraea chinensis) but they are too big according to the info in the MarLIN website. It gives a size of up up 1.5cm across and .5cm high. Biggest one here is 2.3cm acro

Can someone help with an ID for these please? I thought these were Chinaman's Hats (Calyptraea chinensis) but they are too big according to the info in the MarLIN website. It gives a size of up up 1.5cm across and .5cm high. Biggest one here is 2.3cm across and 1.5cm high. Thanks.