Letter S Mail Box Logo for Sale. Very unique and different, the design of the Letter S is unique and simple in the form of two letterheads so that it is formed like a box. Suitable for any business and company, especially companies in the field of chat, service providers, delivery of goods, mail senders, etc. Easy to remember, attractive, elegant, clean, powerful, simple, modern and professional. This symbol is also great for use across all media, be it print or as an avatar for social media, web and mobile icons.