Package

A package formed from a flexible sheet material, the package comprising:

• a first side and a second side;
• and
• a hinge that foldably connects the first side and the second side to each other,
• wherein the first side and the second side transition between a closed state and an opened state by pivoting around the hinge,
• wherein, in the closed state, a space for accommodating an article being provided, in the opened state, the space being opened,
• wherein the first side includes:
• a first fitting portion in any one of a projecting shape and a recessed shape,
• a rigid portion provided in a partial section on a line that goes around the first fitting portion, and
• a first weak portion provided in a remaining section on the line that goes around the first fitting portion and being lower in rigidity than the rigid portion, and
• wherein the second side includes:
• a second fitting portion in an other of the projecting shape and the recessed shape and thus configured to be fitted to the first fitting portion in the closed state, and
• a second weak portion provided on a line that goes around the second fitting portion and being lower in rigidity than the rigid portion.