The standard grips this chord is usually shown with.
Em11 is E, G, B, D, F# and A, a minor eleventh. The shape this page opens on is written 000002, lowest string first.

Also written Emin11, E-11 or E minor 11. The same chord either way; which spelling you meet depends on who wrote the chart.
There are 10 common shapes for Em11 on the guitar, and 64 derived voicings in 5 families.
In which keys. Every note of Em11 belongs to D major (the ii), E minor (the i), G major (the vi) and B minor (the iv).
The common shapes, written lowest string first: 000002, xx2233, 005430, x75755, x75775, x77787, 12-10-12-11-10-10, 12-x-12-12-10-x, 12-12-12-12-12-14, x-x-14-14-15-15.
Shell. Root, third and seventh: the guide tones fix the quality, so the fifth is dropped. That is what leaves a string free, so pick a tension to put on top. Em11 has 0552xx, xx2035, x7x035, x7x785, 12-x-12-12-10-x, 12-10-12-14-x-x, x-7-5-7-10-x, x-7-12-12-10-x.
Drop 2. A close-position chord with the second voice from the top lowered an octave. Sits on four adjacent strings. Em11 has x0203x, xx2233, 5757xx, xx5755, x7778x, x-x-12-12-10-12, 12-12-12-12-x-x, x-x-14-14-15-15.
Drop 3. The third voice from the top lowered an octave. The dropped voice becomes the bass, which is why a string is skipped. Em11 has 3x223x, x5x253, x0x030, 5x575x, x7x785, 10-x-7-9-8-x, x-10-x-9-10-10, 12-x-12-12-10-x.
Rootless. The root left to the bass player. Frees a finger for a tension. Em11 has xx4233, xx0203, x0403x, xx5435, xx5775, x9778x, xx7787, x-10-12-11-10-x.
Open string. An open string left ringing against a fretted grip. Because it costs no finger, it sounds a note the closed shape has none left for -- a tension on top, or a pedal root underneath. Either a familiar grip with open strings added, or a shape so sparse the open strings carry the chord. These belong to their key rather than to a shape, so D, A, G and E have many and Eb a handful. Em11 has 020233, 0x4233, 02523x, 57570x, 35220x, x25230.
Tensions. A shell of Em11, root, third and seventh, leaves a string free, and the tones that belong over it are the 13 (C#).
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.