$breakpoints: (
    'small'      : '(min-width: 320px)',
    'small_only' : '(min-width: 320px) and (max-width: 599px)',
    'medium'     : '(min-width: 600px)',
    'medium_only': '(min-width: 600px) and (max-width: 1022px)',
    'large'      : '(min-width: 1023px)',
    'oversize'   : '(min-width: #{$max-width})'
)
!default;