Document and Entity Information - shares	9 Months Ended
	Oct. 29, 2016	Dec. 01, 2016
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 29, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Trading Symbol	FIVE
Entity Registrant Name	Five Below, Inc.
Entity Central Index Key	0001177609
Current Fiscal Year End Date	--01-28
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		54,882,880