Question: What is the diameter of this mass concentration of galaxies that contains the Local Sheet?

Context articles: Northern Local Supervoid
Local Sheet
Virgo Supercluster
Lenticular galaxy
Galaxy cluster
Mass concentration (astronomy)
Incremental sheet forming
Gram per litre
Alpha sheet
Concentration

The Northern Local Supervoid is a region of space devoid of rich clusters of galaxies, known as a void.
 It is the closest supervoid and is located between the Virgo (Local), Coma and Hercules superclusters. On the sky, it is located between Boötes, Virgo, and Serpens Caput constellations.
 It contains a few small galaxies (primarily spirals) and galaxy clusters, but is mostly empty.
 The faint galaxies within this void divide the region into smaller voids, which are 3–10 times smaller than the supervoid.
 The center is located 61 Mpc away at approximately (15 , +15 ° ) and it is 104 Mpc in diameter across its narrowest width.
The Local Sheet in astronomy is a nearby region of the observable universe where the Milky Way, the members of the Local Group and other galaxies share a similar peculiar velocity.
 This region lies within a radius of about 7 Mpc , 1.5 Mly thick, and galaxies beyond that distance show markedly different velocities.
 The Local Group has only a relatively small peculiar velocity of with respect to the Local Sheet.
 Typical velocity dispersion of galaxies within the Local Sheet is only in the radial direction.
 All nearby bright galaxies belong to the Local Sheet.
 The Local Sheet is part of the Local Volume and is in the Virgo Supercluster (Local Supercluster).
The Virgo Supercluster (Virgo SC) or the Local Supercluster (LSC or LS) is a mass concentration of galaxies that contains the Virgo Cluster in addition to the Local Group, which in turn contains the Milky Way and Andromeda galaxies.
 At least 100 galaxy groups and clusters are located within its diameter of 33 megaparsecs (110 million light-years).
 It is one of about 10 million superclusters in the observable universe.
A lenticular galaxy is a type of galaxy intermediate between an elliptical and a spiral galaxy in galaxy morphological classification schemes.
 Lenticular galaxies are disc galaxies (like spiral galaxies) that have used up or lost most of their interstellar matter and therefore have very little ongoing star formation.
 They may, however, retain significant dust in their disks.
 As a result, they consist mainly of aging stars (like elliptical galaxies).
 Because of their ill-defined spiral arms, if they are inclined face-on it is often difficult to distinguish between them and elliptical galaxies.
 Despite the morphological differences, lenticular and elliptical galaxies share common properties like spectral features and scaling relations.
 Both can be considered early-type galaxies that are passively evolving, at least in the local part of the Universe.
A galaxy cluster, or cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity with typical masses ranging from 10–10 solar masses.
 They are the largest known gravitationally bound structures in the universe and were believed to be the largest known structures in the universe until the 1980s, when superclusters were discovered.
 One of the key features of clusters is the intracluster medium (ICM).
 The ICM consists of heated gas between the galaxies and has a peak temperature between 2–15 keV that is dependent on the total mass of the cluster.
 Galaxy clusters should not be confused with star clusters, such as open clusters, which are structures of stars "within" galaxies, or with globular clusters, which typically orbit galaxies.
 Small aggregates of galaxies are referred to as groups of galaxies rather than clusters of galaxies.
 The groups and clusters can themselves cluster together to form superclusters.
In astronomy and astrophysics, a mass concentration (or mascon) is a region of a planet or moon's crust that contains a large positive gravitational anomaly.
 In general, the word "mascon" can be used as a noun to refer to an excess distribution of mass on or beneath the surface of an astronomical body (with respect to some suitable average), such as is found around Hawaii on Earth.
 However, this term is most often used to describe a geologic structure that has a positive gravitational anomaly associated with a feature (e.g. depressed basin) that might otherwise have been expected to have a negative anomaly, such as the "mascon basins" on the Moon.
Incremental sheet forming (or ISF, also known as Single Point Forming) is a sheet metal forming technique where a sheet is formed into the final workpiece by a series of small incremental deformations.
 However, studies have shown that it can be applied to polymer and composite sheets too.
 Generally, the sheet is formed by a round tipped tool, typically 5 to 20mm in diameter.
 The tool, which can be attached to a CNC machine, a robot arm or similar, indents into the sheet by about 1 mm and follows a contour for the desired part.
 It then indents further and draws the next contour for the part into the sheet and continues to do this until the full part is formed.
 ISF can be divided into variants depending on the number of contact points between tool, sheet and die (in case there is any).
 The term Single Point Incremental Forming (SPIF) is used when the opposite side of the sheet is supported by a faceplate and Two Point Incremental Forming (TPIF) when a full or partial die supports the sheet.
A gram per litre or gram per liter (g/L or g/l) is a unit of measurement of mass concentration that shows how many grams of a certain substance are present in one litre of a usually liquid or gaseous mixture.
 It is not an SI unit - the SI unit of mass concentration is kilogram per cubic metre, which is equivalent (1 g/L = 1 kg/m).
Alpha sheet (also known as alpha pleated sheet or polar pleated sheet) is an atypical secondary structure in proteins, first proposed by Linus Pauling and Robert Corey in 1951.
 The hydrogen bonding pattern in an alpha sheet is similar to that of a beta sheet, but the orientation of the carbonyl and amino groups in the peptide bond units is distinctive; in a single "alpha strand", all of the carbonyl groups are oriented in the same direction on one side of the pleat, and all of the amino groups are oriented in the same direction on the opposite side of the sheet.
 Thus the alpha sheet accumulates an inherent separation of electrostatic charge, with one edge of the sheet exposing negatively charged carbonyl groups and the opposite edge exposing positively charged amino groups.
 Unlike the alpha helix and beta sheet, the alpha sheet configuration does not require all component amino acid residues to lie within a single region of dihedral angles; instead, the alpha sheet contains residues of alternating dihedrals in the traditional right-handed (α) and left-handed (α) helical regions of Ramachandran space.
 Although the alpha sheet is only rarely observed in natural protein structures, it has been speculated to play a role in amyloid disease and it was found to be a stable form for amyloidogenic proteins in one set of molecular dynamics simulations.
 Alpha sheets have also been observed in X-ray crystallography structures of designed peptides.
In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture.
 Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration.
 The term concentration can be applied to any kind of chemical mixture, but most frequently it refers to solutes and solvents in solutions.
 The molar (amount) concentration has variants such as normal concentration and osmotic concentration.