: Look for "UV stabilized" versions if the plastic will be used outdoors for long periods to prevent yellowing or brittleness.
: 4mm (approx. 0.157") is the standard for signs and crafts. Heavy-duty applications like temporary partitions or floor protection often require 10mm thickness.
15-Pack 24 in. x 36 in. x 0.157 in. White Corrugated Twinwall