Police are investigating after the Hearts club shop at Tynecastle was broken into on Friday night.
The suspects stole a number of Hearts shirts - pale blue and white striped Adidas short sleeved shirts, bearing the Hearts logo on the left breast.
Police said the shop would be open in time for today’s Edinburgh Derby.
Superintendent Phil O’Kane, Match Commander for today’s New Year Derby, said: “This was a calculated theft with the explicit aim of retrieving merchandise which could be illegally sold on.
“We are asking the public and those attending Tynecastle today to be especially vigilant.
“Should any persons be seen today selling or offering these shirts for sale in suspicious circumstances, then this theft should be borne in mind.
“Police Scotland is committed to keeping people safe and will be in attendance at today’s match. We want everyone to enjoy themselves, but at the same be watchful for any criminality or anti-social behaviour on the day and report it to police.”
Anyone with information should Police Scotland on 101 or Crimestoppers on 0800 555111.