How long should putting mat be?

Putting Mat comparison

Insta360 X4 Original price was: $699.00.Current price is: $658.00.
BLUETOOTH HEADPHONE BY MPOW Original price was: $31.99.Current price is: $11.99.
BLUETOOTH HEADPHONE BY SOULSENS Original price was: $19.99.Current price is: $9.99.
PROTECTION GEARS- KNEE PADS ELBOW PADS WITH WRIST GUARDS Original price was: $29.99.Current price is: $19.99.
SKATEBOARDING HELMET BY BACKFIRE (28) Original price was: $99.99.Current price is: $49.99.