tapla gismu

x1 is a tile/cake [shape/form] of material x2, shape x3, thickness x4.

A tile is a 3-dimensional object, relatively uniform and significant in the 3rd dimension, but thin enough that its shape in the the other two dimensions is a significant feature; 'city block' is conceptually a tile; polygon (= taplytai or kardytai - shaped like an approximately-2-dimensional block, lijyclupa - a loop composed of lines). (cf. bliku, kubli, matci; karda, for which the 3rd dimension is insignificant, bliku, kurfa, matci, plita, tarmi)

In notes:

x1 is a block [3-dimensional shape/form] of material x2, surfaces/sides x3.
x1 is a card [small nearly-2-dimensional shape/form] of material x2, shape x3.
x1 is a cube/regular polyhedron/polygon of dimensions x2 (def. 3), surfaces/sides x3 (def. 6).
x1 is a right-angled shape/form defined by set of vertices x2, dimensions x3 (default 2).
x1 is a mat/pad/mattress/pallet [flat, soft, dense form] of material x2.
x1 is a plane [2-dimensional shape/form] defined by points x2 (set); x1 is flat/[smooth].
x1 [ideal] is the conceptual shape/form of object/abstraction/manifestation x2 (object/abstract).
t1 is a roof tile of material t2, shape t3, thickness t4.