The standard grips this chord is usually shown with.
Bsus2 is B, C# and F#, a suspended second. The shape this page opens on is written x24422, lowest string first.

Also written B2 or B suspended 2nd. The same chord either way; which spelling you meet depends on who wrote the chart.
There are 8 common shapes for Bsus2 on the guitar, and 46 derived voicings in the triad family.
In which keys. Every note of Bsus2 belongs to C# minor (the ♭VII), D major (the vi), Eb minor (the ♭VI), E major (the V), F# major (the IV), F# minor (the iv), Ab minor (the ♭III), A major (the ii), B major (the I) and B minor (the i).
The common shapes, written lowest string first: x24422, 74467x, x44477, 7xx677, 799x79, x-x-9-11-12-9, x-14-11-11-12-14, x-x-11-11-12-14.
Triad. Three notes across one string set. Bsus2 has xxx422, xx442x, x2442x, x4442x, xx4422, 2444xx, x444xx, xxx677.
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.