Pearlescent Oyster Envelopes – All Sizes In Stock – Lowest UK PriceA select range of 100gsm pearlescent oyster white envelopes. These envelopes have a beautiful metallic shine in a stunning white finish and are available in all our popular envelope sizes. They are particularly suitable for celebrating a wedding, the birth or christening of a baby or even a birthday. These are also great if they're matched to your corporate branding.