The standard grips this chord is usually shown with.
Ab11 is Ab, Eb, Gb, Bb and Db, a dominant eleventh. The shape this page opens on is written x31122, lowest string first.

Also written Ab9sus4 or Ab dominant 11. The same chord either way; which spelling you meet depends on who wrote the chart.
There are 5 common shapes for Ab11 on the guitar, and 55 derived voicings in 3 families.
In which keys. Every note of Ab11 belongs to C# major (the V), Eb minor (the iv), F# major (the ii), Ab minor (the i), Bb minor (the ♭VII) and B major (the vi).
The common shapes, written lowest string first: x31122, 444544, 666678, x-11-10-11-9-9, x-11-11-11-13-11.
Drop 2. A close-position chord with the second voice from the top lowered an octave. Sits on four adjacent strings. Ab11 has xx1122, xx4324, 4443xx, 4646xx, xx4644, xx6676, x6667x, x-x-11-11-9-11.
Drop 3. The third voice from the top lowered an octave. The dropped voice becomes the bass, which is why a string is skipped. Ab11 has x1x122, x4x142, 2x112x, 4x432x, x4x374, 4x464x, x6x674, 6x667x.
Rootless. The root left to the bass player. Frees a finger for a tension. Ab11 has xx1322, x4434x, xx4646, x6867x, xx8879, x-x-11-11-11-11, x-x-13-15-14-14, x4x342.
The common shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.