Bardot will close a majority of its 72 stores by March 1.
The 58 site closures come as administrators from KPMG take control of the business in pursuit of a sale and recapitalisation process.
The 14 remaining stores will continue to trade on a business as usual basis, administrator Brendan Richards said.
“While closing stores is a very difficult decision to make, our analysis has determined it is a necessary step in rebuilding the financial performance of the business and maximising the prospects of a successful sale or restructure.
“Subject to ongoing trading performance and discussions with landlords, it is not our intentio to close further stores at this point in time.”
Bardot went into voluntary administration on November 29.
It blamed a highly competitive and discount driven market for its demise.