Make your window an inch or two bigger than than the width of one inline-block. All inline-blocks should be the same size. Try resizing the window so that inline-blocks wrap in one or two columns.

There is filler text in the first line, it should merely indent the first line but not affect the rustulting size.

(filler text) this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block this is an inline-block