The phrase "are obviously smaller" is correct and usable in written English.
It can be used when making a comparison to highlight that one or more items are clearly less in size than others.
Example: "The new models are obviously smaller than the previous versions, making them easier to handle."
Alternatives: "are clearly smaller" or "are evidently smaller".
Here, the stabilizing contributions are obviously smaller than the destabilization caused by the introduction of the new side chains.
It is shown from the study that the damping modification factors presently used in Taiwan are obviously smaller than those calculated from the Chi-Chi earthquake.
As we can see, the cross-correlations of the optimized sensing matrix are obviously smaller than that of the random matrix.
All of the form deviations of the cam profile obtained by the minimum zone criterion (MZC) satisfy the geometrical condition of the MZC resolution and are obviously smaller than those obtained by the least square criterion.
In the infrared waveband, the PIDE decreases in the LWIR are obviously smaller than that in the MWIR for the same substrate material combination, and the PIDE cannot be calculated when the incident angle larger than critical angle.
It is clear that for the GIS total liabilities ratios of the first group, the index is larger than 1 and mainly includes light industry, and the ratios are obviously smaller than in the second group.
New York State is, obviously, smaller than the federal government, but it's not that small.
For men with a professional degree the figure is 65% (though the overall number of such men is obviously smaller).
The event was (obviously) smaller, but included a "gorgeous outdoor ceremony" that still had "all the fanfare of a big Lebanese wedding", Francis told the Guardian.
Though Ms. Miller's presence in a supporting role was enough to boost box office in a London production of "As You Like It" five years ago, her brand-name recognition value is obviously smaller stateside.
