Heat-shrinkable polyester-based film roll

A heat-shrinkable polyester-based film roll, which is obtained by winding a heat-shrinkable polyester-based film that has a shrinkage ratio of 30% or more in a film main shrinkage direction in hot water at 90° C. for 10 seconds, the heat-shrinkable polyester film and the film roll satisfying following requirements (1) to (6):

• (1) a winding length of the film roll is 2000 m or more and 25000 m or less;
• (2) a width of the film roll is 400 mm or more and 2500 mm or less;
• (3) a thickness of the film is 5 μm or more and 40 μm or less;
• (4) in thickness unevenness in a width direction of the film on a surface layer of the film roll, there are positions having concave thickness patterns, and in a concave portion that has a maximum thickness difference denoting a maximum concave portion, thickness unevenness in the maximum concave portion, which is obtained from the maximum thickness difference in the maximum concave portion and an average thickness of the film is 10% or less;
• (5) winding hardness of the surface layer of the film roll is 400 or more and 800 or less;
• and
• (6) an absolute value of a difference between refractive index in the width direction at a maximum thickness position of either of both ends of the concave portion and at the minimum thickness position of the concave portion in the maximum concave portion is 0.01 or less.