What is playing area in Boxing (WBO)?

Section 3: Playing Area

WBO championship contests shall be held in a ring that meets the following requirements:

The ring shall be no less than sixteen feet (16') and no more than twenty feet (20') square inside the ropes. The WBO recommends a ring size of eighteen feet (18') for championship contests.
The ring floor shall be padded with approved material not less than one inch (1") thick, covered by a canvas stretched tightly and laced securely to the ring platform. The canvas shall be clean and free of any resin, slippery, or foreign substances.
The ring shall be equipped with four (4) ropes of not less than one inch (1") in diameter, covered with soft material, stretched tightly between the ring posts. Ropes shall be at heights of approximately 18, 30, 42, and 54 inches above the ring floor.
Ring posts shall be of metal construction, properly padded with protective cushions. Turnbuckles shall be completely covered with protective padding.
The ring platform shall be elevated no less than three feet (3') and no more than four feet (4') above the floor of the venue, with suitable steps for access on at least two sides.
A ring apron of not less than two feet (2') in width shall extend beyond the ropes on all sides.

The champion (or the higher-ranked contestant) shall be assigned the red corner; the challenger (or lower-ranked contestant) shall be assigned the blue corner.
The two remaining neutral corners shall be equipped with padding and shall be clearly designated.
Each corner shall have a clean water bucket, a spit bucket, and an ice bucket. No other items may be present in the corner area without prior approval from the WBO supervisor.

WBO championship contests shall be held in a ring that meets the following requirements:

The ring shall be no less than sixteen feet (16') and no more than twenty feet (20') square inside the ropes. The WBO recommends a ring size of eighteen feet (18') for championship contests.
The ring floor shall be padded with approved material not less than one inch (1") thick, covered by a canvas stretched tightly and laced securely to the ring platform. The canvas shall be clean and free of any resin, slippery, or foreign substances.
The ring shall be equipped with four (4) ropes of not less than one inch (1") in diameter, covered with soft material, stretched tightly between the ring posts. Ropes shall be at heights of approximately 18, 30, 42, and 54 inches above the ring floor.
Ring posts shall be of metal construction, properly padded with protective cushions. Turnbuckles shall be completely covered with protective padding.
The ring platform shall be elevated no less than three feet (3') and no more than four feet (4') above the floor of the venue, with suitable steps for access on at least two sides.
A ring apron of not less than two feet (2') in width shall extend beyond the ropes on all sides.

The champion (or the higher-ranked contestant) shall be assigned the red corner; the challenger (or lower-ranked contestant) shall be assigned the blue corner.
The two remaining neutral corners shall be equipped with padding and shall be clearly designated.
Each corner shall have a clean water bucket, a spit bucket, and an ice bucket. No other items may be present in the corner area without prior approval from the WBO supervisor.