This disk does not have enough space to restore your system
I found the answer here:
https://stackoverflow.com/questions/29397749/this-disk-does-not-have-enough-space-to-restore-timemachine


  For updating a date backup file size:
  
  Use Disk Inventory X for finding the size of the backup date folder
  "/Volumes/Drive/Backups.backupdb/xxx\ MacBook\
  Pro/2014-11-19-174311/Machintosh HD"
  
  Open Terminal go to the folder of the backup date folder "cd
  "/Volumes/Drive/Backups.backupdb/xxx\ MacBook\ Pro/2014-11-19-174311/"
  
  Enter the cmd "xattr -l Macintosh\ HD/"
  
  It will show a bytes value like this "2123231232" next to
  "com.apple.backupd.VolumeBytesUsed"
  
  Use Google Convertor GB to Bytes for convert the GB value to bytes and
  vice versa.
  
  Check the value shows in terminal and disk inventory x same.
  
  If different, use the convertor with disk inventory x value and get
  bytes value.
  
  Use cmd "xattr -w com.apple.backupd.VolumeBytesUsed 219637221376
  [Machintosh HD folder].
  
  Again use the cmd "xattr -l Macintosh\ HD/" for the value is updated.
  
  That is it.. Now your are ready to go..