Disc brake caliper of human-powered vehicle

A disc brake caliper of a human-powered vehicle, comprising:

• a caliper body including:
• a first hole having a first inner diameter;
• a second hole having a second inner diameter;
• a first interior wall;
• a second interior wall;
• and
• a pad space in which a brake pad is to be at least partially provided, the pad space being defined between the first interior wall and the second interior wall in an arrangement direction;
• a first piston movably provided in the first hole, the first piston having a first outer diameter, the first outer diameter being larger than or equal to 19 mm;
• a second piston movably provided in the second hole;
• the first hole being spaced apart from the second hole to define a distance between the first hole and the second hole in the arrangement direction;
• the pad space having a length defined between the first interior wall and the second interior wall in the arrangement direction;
• and
• a total of the first inner diameter, the second inner diameter, and the distance being greater than the length of the pad space.