NEW YORK, April 2 (Reuters) - Crocs Inc (CROX.O) said on Thursday April 2 that it was launching a cash tender offer for employee stock options worth up to $315,000, sending the shoe maker's shares up nearly 7 percent in premarket trading.

www.Crocs.com

The company said it expected to incur a one-time stock-based compensation charge of up to $32 million if all unvested eligible options are tendered and accepted.

As of March 27, there were about 5.1 million options eligible, meaning that they had an exercise price at or above $10.50 per share.

If all the eligible options are tendered and accepted in the offer, the total purchase price would be about $315,000, Crocs said.

Crocs shares were up 10 cents at $1.56 in trading before the market opened. (Reporting by Martinne Geller; Editing by Lisa Von Ahn)