razmer

/razmer/

Cases

SingularPluralWhen to use it
nominativerazmerthe sizerazmerlethe sizesthe plain dictionary form — the doer of the sentence
genitiverazmernithe size'srazmerlenithe sizes'the owner — whose it is
accusativerazmernithe size (as the object)razmerlenithe sizes (as the object)a specific, known object — whom or what
dativerazmergeto the sizerazmerlegeto the sizesdirection or recipient — to where, to whom
locativerazmerdeat / in the sizerazmerledeat / in the sizeswhere it is; also having — mende bar, "I have it"
ablativerazmerdenfrom the sizerazmerledenfrom the sizeswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
myrazmerimmy sizerazmerlerimmy sizes
yourrazmeringyour sizerazmerleringyour sizes
his / herrazmerihis / her sizerazmerlerihis / her sizes
ourrazmeribizour sizerazmerleribizour sizes
you all'srazmerigizyou all's sizerazmerlerigizyou all's sizes
theirrazmerleritheir sizerazmerleritheir sizes

The overlap in the last rows is real, not a mistake: razmerleri can mean "his / her sizes", "their size", or "their sizes" — context decides.