All our products are handmade by us at SlinkySkin we use 0.4 mm Radical Rubber latex

We use discreet shipping packaging.

Size is dependant on neck size
Small: upto 13 1/2 (34 cm)
Medium:between 13 1/2 and 15 1/2 (34cm -39cm)
Large:between 15 1/2 and 16 1/2 (39cm - 42cm)