A list of 55 Blenko designs for which knock-offs or remarkably similar non-Blenko versions are known with particularly common or confusing ones in bold.

Most of the non-Blenko version are easily distinguished from the original Blenko version as the shapes, dimensions and colors are all at least slightly incorrect. Any distinguishing charateristics of the non-Blenko version are noted after a colon.

- 3626S "web" ball vase, unknow: flange collar

- 3627L leaf beaker, Italian

- 3749G double ring glasses, American (attrib. Bonita , WV): rings molded to glass & same color

- 428 footed urn vase, Sea Glass (Sweden): lighter, thinner glass

- 469 footed vase, Bischoff WV: much larger & wider

- 473 flared cylindrical vase with "wings", Bischoff WV and others: body narrows towards top or straight cylinder body

- W492 "winged" vase, unkown

- 902 floating candle holders, Ekenas ( Sweden )

- 903-2 2 dent vase, Pilgrim WV

- 903-4 4 dent vase, Pilgrim WV

- 920 conical decanter with teardrop stopper, Italian, Pilgrim WV & others

- 921 dented vase, Bischoff WV & Italian

- 947 crimped vase or rose bowl, Pilgrim WV & others

- 948 bent neck decanter, Pilgrim WV , Italian, & Erickson OH

- 949 dented vase, Bischoff WV & others

- 951 slant ashtray with blob rest, Erickson OH & Steuben NY

- 952 & 953 epergne, Italian

- 955L "Asymmetrical Bowl" or free-form bowl, Viking Glass WV

- 5411 conical footed compote, Italian

- 542 oval iron molded vase, Scruff (Sweden)

- 5422 vase with abstract blown-out design, Chalet (Canada): dimensions and shape of design different

- 5427 gurgle decanter. Italian & others: less space between bulbous bulges in body

- 5433 fish vase, Italian: colored fins, crystal body

- 5521 narrow waist cylinder decanter, Italian: larger, hollow & enclosed stopper

- 563 "mushroom" or barbell shaped decanter, Italian: harrower, non-ground stopper

- 564 high collar teardrop decanter with reverse teardrop stopper, Italian: non-ground stopper, collar usually to short & wide

- 5710 pitcher, Italian: lighter, thinner glass, form not well defined

- 5720 Napoleon decanter, Italian: flange top on body

- 5727 ball vase on tall trumpet foot, Italian: glass thinner & lighter, top no ball shaped

- 581 "echoes" chalice, Italian: top shape narrows in rather than flaring out

- 5825 twisted decanter, Italian

- 599 long split-bottle bowl, Erickson OH

- 5922S decanter, Italian: stopper not fully ground

- 5931 doughnut decanter, Kanawah WV & Bischoff WV: central indentation not fully pronounced and not the imporession of a full circle, just an indentation

- 5937 cone stopper decanter, Italian: no pontil, stopper not fully ground

- 5940 vase with four blobs, Whitefriars (UK): shorter

- 6027 shot glass stopper decanter, unkown: clear stopper

- 6122 flame stopper bell bottom decanter, Italian: stem and flange on stopper, flange top on bottle

- 6211 footed ball decanter, Italian: stem and foot crystal or different color

- 6213 obelisk decanter, Italian & Greenwich Flint Craft IN: square stopper or round body

- 6215 textured flame decanter, Italian: flange on unground stopper stem

- 6212 footed flame stopper genie decanter, Italian: fatter stopper often a flange on neck or stopper

- 6228 textured decanter, Italian: lower "cube" portion of base missing

- 6310 ovoid bumps decanter, Italian: one fewer "bump" in body design, mold lines on stopper

- 6315 broad flattened decanter, Italian: evenly stippled surface (like hammered metal) and unground stopper stem, often with plastic

- 639 molded decanter with flower line drawing, Italian: extra leaf on flower stem, aslo sometimes with bird or grape design instead of flower

- Gumps (1964) Gumps applied band decanter, unknown: narrower band, air twist stopper, flange top neck

- 6525 figural lady decanter, Italian: unground stopper, stopper under head missing attaching glass blob.

- 6533 ball decanter with ball stopper, Italian: stopper light and stem hollow

- 6625 clown vase, Italian: lacks "ruffled" rim, has lid

- 6629 ship's decanter, Italian: stopper sits lower in neck and not fully ground, lighter, thinner glass

- 6937 flared collar bottle, Greenwich Flint Craft IN: shorter, with longer neck

- 7020 mushroom paperweights, Viking WV , Kanawha WV and others: some molded, solid colors

- 7042 conical footed compote, Italian

- 7043S conical footed ball vase, Italian

- 7118 decanter with reverse teardrop body and stopper, Italian: teadrop rather than reverse teardrop stopper