diff --git a/examples/constants.cr b/examples/constants.cr
new file mode 100644
index 0000000..6fdffdf
--- /dev/null
+++ b/examples/constants.cr
@@ -0,0 +1,26 @@
+require "../src/sodium"
+
+{% for name in %w(KEY_SIZE KEY_SIZE_MIN KEY_SIZE_MAX SALT_SIZE PERSONAL_SIZE OUT_SIZE OUT_SIZE_MIN OUT_SIZE_MAX) %}
+  puts "Sodium::Digest::Blake2b::{{ name.id }} #{Sodium::Digest::Blake2b::{{ name.id }}}"
+{% end %}
+puts ""
+
+{% for name in %w(OPSLIMIT_MIN OPSLIMIT_INTERACTIVE OPSLIMIT_MODERATE OPSLIMIT_SENSITIVE OPSLIMIT_MAX) %}
+  puts "Sodium::Digest::Pwhash::{{ name.id }} #{Sodium::Pwhash::{{ name.id }}}"
+{% end %}
+puts ""
+
+{% for name in %w(MEMLIMIT_MIN MEMLIMIT_INTERACTIVE MEMLIMIT_MAX) %}
+  puts "Sodium::Digest::Pwhash::{{ name.id }} #{Sodium::Pwhash::{{ name.id }}}"
+{% end %}
+puts ""
+
+{% for name in %w(STR_SIZE) %}
+  puts "Sodium::Digest::Pwhash::{{ name.id }} #{Sodium::Pwhash::{{ name.id }}}"
+{% end %}
+puts ""
+
+{% for name in %w(KEY_SIZE CONTEXT_SIZE) %}
+  puts "Sodium::Digest::Kdf::{{ name.id }} #{Sodium::Kdf::{{ name.id }}}"
+{% end %}
+puts ""
diff --git a/src/sodium/pwhash.cr b/src/sodium/pwhash.cr
index 4cf1e02..48702f6 100644
--- a/src/sodium/pwhash.cr
+++ b/src/sodium/pwhash.cr
@@ -3,7 +3,7 @@ module Sodium
   # * #store #verify #needs_rehash? are used together for password verification.
   # * #key_derive is used on it's own to generate password based keys.
   #
-  # See `examples/pwhash_selector.cr` for help on selecting parameters.
+  # **See `examples/pwhash_selector.cr` for help on selecting parameters.**
   class Pwhash
     class PasswordVerifyError < Sodium::Error
     end
@@ -15,10 +15,10 @@ module Sodium
     OPSLIMIT_MAX         = LibSodium.crypto_pwhash_opslimit_max
 
     MEMLIMIT_MIN         = LibSodium.crypto_pwhash_memlimit_min
-    MEMLIMIT_MAX         = LibSodium.crypto_pwhash_memlimit_max
     MEMLIMIT_INTERACTIVE = LibSodium.crypto_pwhash_memlimit_interactive
+    MEMLIMIT_MAX         = LibSodium.crypto_pwhash_memlimit_max # Don't use this.  Maximum of the library which is more ram than any computer.
 
-    PWHASH_STR_SIZE = LibSodium.crypto_pwhash_strbytes
+    STR_SIZE = LibSodium.crypto_pwhash_strbytes
 
     # Use the most recent algorithm Argon2id13 for new applications.
     enum Algorithm
@@ -39,7 +39,7 @@ module Sodium
     # * the automatically generated salt used for the previous computation
     # * the other parameters required to verify the password, including the algorithm identifier, its version, opslimit and memlimit.
     def store(pass)
-      outstr = Bytes.new PWHASH_STR_SIZE
+      outstr = Bytes.new STR_SIZE
       if LibSodium.crypto_pwhash_str(outstr, pass, pass.bytesize, @opslimit, @memlimit) != 0
         raise Sodium::Error.new("crypto_pwhash_str")
       end