The lines marking out the court are easily distinguishable and coloured white or yellow. The lines are 40mm wide. A court may be marked out for singles only. The back boundary lines also become the long service lines and the posts or the strips of material representing them are placed on the side lines.
- A legal doubles serve would land in the area bounded by the center line, the doubles long service line, the doubles side line and the short service line (short and wide). - Once the serve is made in doubles, the court area is bounded by the doubles sideline and the back boundary line.
With laws of badminton dictating specific rules for service in badminton, the court has two service lines, the short service line, which is 1.98m (6.5 feet) from the net, and long service line 0.72m (2.36 feet) in from the baseline, specifically marked for this purpose.
For Doubles: During service, the left & right side boundaries are considered as valid. While, the back boundaries are considered as invalid. However, during game play the complete court is considered as valid.
Baseline: This indicates the boundary of the court lengthwise. When a player is serving, they must stand behind this line. Also, if a player hits a shot that lands past the baseline, it is considered “out,” and that player loses the point. Doubles Line: This line is only relevant during doubles matches.
Boundary lines is a part of the badminton court. Outdoor badminton field should be rectangle measuring 5,18 m x 13,40 m for single competition and 6,10 m x 13,40 m for doubles. Boundary lines are adjustable for single and double play with maximum dimensions of 6,10 m x 13,40 m.
So just to be clear, a doubles service court is made from these four lines: The centre line. A doubles side line (outside side line) The front service line. The inside back line (not the very back line, but the next one in)
In singles the court is thinner, with the wide, outside 'tramlines' out of bounds. In doubles the court is full width and these tramlines are now 'in'. During service in doubles, the court is short, with the rear 'tramlines'at the back of the court, being out of bounds until the serve is returned.
The outer sidelines are sometimes referred to as “outer tramlines” or “doubles sidelines”. On a regulation badminton court, the outer sidelines will run the full 13.41m /44.00ft length of the court. The outer sidelines are marked 5.18m (17.00ft) apart and run parallel to one another.