RavelUnisex Easy Read Watch with Big Numbers - Analogue Quartz - R0105

Anyone know how long the strap is please?

Is the back of the watch (the metal part that touches the skin) made from stainless steel? Thanks

What size is the watch face?

Is the glass real glass or plastic, would need plastic lens for my work? Also how wide is the strap, 18mm plus preferred. Thank you. Con